Scientists study the world and learn about things using a process called the scientific method(方法). By asking important questions and 16 the answers, it is possible to make amazing discoveries! Sometimes a scientist is 17 to answer his own questions, but if he has taken good notes another scientist may come along later who is able to use new knowledge to answer it.
When you use the scientific method to 18 an experiment, you start by making observations(观察) about something that 19 you. Based on your observations, you make a hypothesis. This is using 20 you know to make a smart guess about what you think could happen. Then you are ready to begin your experiment. All 21 your experiment you take down notes, which are 22 experiment date(资料). You are constantly making observations during this time. You may make discoveries that cause you to improve your experiment as you go. 23 , you conclude your experiment and begin to look over your notes to decide what it all means. Based on what you have learned, you make a final statement about 24 your hypothesis was correct or not. You have to have reasons and evidence to support what you are saying.
Using the scientific method can be difficult, but rewarding. Because all the steps are organized in a process, the 25 are more valid(可信的). When you provide observations as evidence to support what you are saying, your ideas are more likely to be accepted.
A．waiting for B．searching for C．worrying about D．complaining about
A．unable B．sure C．ready D．surprised
A．read B．refuse C．prevent D．conduct
A．hurts B．represents C．interests D．attacks
A．what B．when C．why D．which
A．without B．including C．except D．during
A．controlled B．arranged C．called D．carried
A．Obviously B．Suddenly C．Finally D．Mostly
A．whether B．what C．how D．when
A．problem B．results C．services D．aims
A little boy was attracted(吸引)by a board above the door of a shop. It read, "Little Dogs for Sale." A 16 like that has a way of attracting small children into the shop.
The little boy walked into the shop and found a dog behind other dogs and said, "What’s 17 with that little dog?"
The store owner said that the vet(兽医) 18 the little dog and found it was 19 . It would always be lame(破的).
The little boy became 20 ."That is the dog that I want to buy. "
The store owner said, "No, you don’t need to buy that little dog. If you really want him,
I’ll just give him to you. "
The little boy got quite sad. He said angrily, "I don’t want you to give him to me. I’ll 21 the full price for him. In fact, I’ll give you $ 2.37 now, and 50 cents a month 22 I have paid the full price. "
The store owner continued, "He is 23 going to be able to run and jump and play with you like the other dogs."
To his 24 ,the little boy rolled up(卷起)his trousers to show his badly hurt left leg. He looked at the store owner and 25 answered," Well, I don’t run so well myself and the little dog will need someone who understands him. "
A．sign B．school C．mark D．signal
A．wrong B．matter C．reason D．purpose
A．went B．cured C．treated D．left
A．deaf B．blind C．disabled D．homeless
A．silent B．excited C．exciting D．interesting
A．spend B．cost C．take D．pay
A．since B．so C．until D．and
A．always B．never C．ever D．sometimes
A．joy B．sadness C．surprise D．delight
A．softly B．shortly C．badly D．correctly
John loved basketball. One day, as he was walking to a basketball game, he dreamed about playing basketball for the college team the next year. Suddenly a car hit him and he was thrown three meters 36 .
John woke up in a hospital room. When the doctor told him that both his legs were broken, he knew his college basketball 37 was over. John did what the doctors told him. but it 38 . When he left the hospital, John was sent to a rehab center(康复中心).
A week 39 he arrived there, he met Sunny Chen. Sunny used to be a coach(教练). His legs were badly hurt in a skating accident.
Though he couldn’t move his legs, Sunny became the coach of a basketball team called the Suns. It was an on-wheelchair basketball team, because 40 on the team played from a wheelchair(轮椅). Sunny invited John to 41 the game. John played badly, but for the 42 time since the accident. he stopped feeling sorry for himself.
After becoming a part of the Suns. John improved quickly. Basketball was like medicine for him. John was much 43 than before. When John became unhappy, Sunny was there to comfort him. The day before John 44 the center, he had dinner with Sunny. He asked Sunny how he could be so happy even with his broken legs.
Sunny 45 and said, "It’s really quite easy. When you keep your face to the sun. the shadows will fall behind."
A．away B．from C．out D．in
A．game B．dream C．team D．coach
A．worked B．affected C．didn’t work D．didn’t affect
A．until B．when C．before D．after
A．somebody B．anybody C．everybody D．nobody
A．join B．show C．study D．watch
A．next B．last C．first D．early
A．worse B．better C．busier D．smarter
A．arrived B．got to C．went to D．left
A．smiled B．shouted C．cried D．turned
It was sunny and hot all day. I went to the beach with my friends. We had a lot of fun __21__at sea(大海).In the afternoon, we__22___. There ___23__many people in the museum. It was crowded, so I____24__ really enjoy it. __25___home. I found a little girl __26___in the street. She __27__and I helped her ___28__her mother. It made me feel very happy. I didn’t any money ____29__a taxi, so I walked back home. I was really___30____.
A．swim B．to play C．running D．swimming
A．went shopping B．stayed at home C．visited a museum D．read books
A．are B．is C．was D．were
A．/ B．didn’t C．don’t D．can’t
A．In my way B．At my way C．On my way D．On my way to
A．cried B．crying C．is crying D．cries
A．lost B．is lost C．was lost D．has lost
A．found B．to visit C．find D．with
A．by B．take C．in D．for
A．relaxing B．unhappy C．tired D．awful
We all know that it is __1__to keep healthy. But not all people know ___2__to keep healthy.
After five days’ hard work, we need to have a good rest at weekends. But it seems that some don’t know how to spend weekends in the right way. They enjoy ___3__ cards at night and don’t go to bed until midnight. Some gamble (赌博) all night. They forget that to get___4__sleep is good for health. Some never get up early in the __5___ and take some exercise. It is true that doing exercise is very important for us to keep ___6__. Some smoke（抽烟）___7________. Some drink too much wine（酒）. ____8___ too much is harmful (有害) to the body. Some eat too much rich food and get fatter and fatter. If you are much too fat, you may always ____9___ tired. Vegetables are good to the body. But some don’t like eating vegetables. _____10___ is also very good to body. As a saying (谚语) goes, "An apple every day keeps the doctor away." So don’t forget to eat some fruit.
A．important B．good C．nice D．happy
A．when B．how C．what D．why
A．to play B．play C．playing D．plays
A．much B．many C．a little D．enough
A．morning B．afternoon C．evening D．day
A．health B．healthy C．clear D．up
A．lots of B．a lot C．a lot of D．a lots of
A．Drink B．Drinking C．Eat D．Smoke
A．are B．keep C．say D．feel
A．Water B．Milk C．Tea D．Fruit
We live in “computer age(时代)”. People like using computers to do ___21__work. But more than 20 years ago, ___22__couldn’t do much. They were very big and expensive. Very __23___people were interested in them and knew how to use them. Today computers are smaller and ___24___.Since they are useful, many people like to use them, even at home.
Computers ___25___very important because they can work ___26___than men and make fewer mistakes. Computers can ____27___people do a lot of work. Writers can use computers to write. Teachers can use computers to help teaching and students use them to study. Computers can also remember what you put ___28____ them. Computers are very___29___. They are our good friends. Do you want to ___30____a computer.
A．all kinds of B．many C．very much D．a lot
A．teachers B．students C．computers D．scientists
A．a few B．few C．little D．a little
A．cheaper B．cheap C．expensive D．more expensive
A．is becoming B．becomes C．become D．became
A．quickly B．quick C．fast D． faster
A．help B．tell C．ask D．stop
A．on B．into C．up D．to
A．heavy B．careful C．beautiful D．helpful
A．lend B．pay C．have D． sell
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