There are seven c______ in the world, of which Asia is the largest.
The house was s______ by high walls.
When are you going to marry and s______ down?
The terrorists(恐怖分子)escaped across the _______(边境).
The patient is _______(稍微)better today.
Drop in for a c______ if you have an hour to spare this evening.
Could you m______ the height of the wall for me?
They finally went a______ the plane.
Several boats lay at another in the h______.
Can you help me? My _______(行李)is too heavy.
We need to _______(测量)the length of the windows for new curtains.
My father traveled _______(在……上)a train.
They moved the local people and ________(安排)them in another place.
It is pleasant to ________(聊天)with friends.
Make sure you ________(设法做)to finish this work before the end of the month.
I won’t calm down until he is out of ________(视线).
There was a ________(稍微的)increase in her weight after the winter holidays.
This group of mountains ________(环绕)each other so that it is quite easy to get lost here.
The ________(风景)was so beautiful that it was almost beyond description.
He was interested in a________ and always stayed up at night to watch the stars.
Not long ago a v________ earthquake occurred off the coast of Indonesia.
Computer hackers have broken down security s________, raising questions about the safety of information.
Too much sugar can be h________ to children’s teeth.
The three-star hotel offers a friendly a_______ and personal service.
China has sent up another ________(人造卫星) into space.
There is a lot of rubbish ________(漂浮)on the surface of the river.
________(理论)is based on practice.
The ________(气候)is different from palce to place.
6 ________(乘)by 5 is 30.
系统，体系，制度n. __________
宗教，宗教信仰n. __________
学说，理论n. __________
原子n. __________
万亿pron. __________
球体，地球仪n. __________
猛烈的，激烈的adj. __________
碳n. __________
大气层，气氛n. __________
不同，不像prep. __________
基本的，基础的adj. __________
有害的adj. __________
酸n. __________
二氧化碳n. __________
谜，难题n. __________
因此adv. __________
存在，生存vi. __________
乘，增加vi.&vt. __________
I like to have ice cream for d________.
The boy was ________(尖叫)with pain.
It’s impossible to cut a ________(菠萝)with such a dull knife.
It’s very r________ of her to leave without telling us.
I don’t mind. I ________, I am delighted to help.
Everybody ________(鞠躬)as the queen walked into the room.
It’s either a g_______ diamond, or a very good fake.
I gave the dog some lovely s_______, but he just looked down his nose as it!
I hope I remembered to ask the b_______ not to cut my hair too short.
He cleaned the car with an only ________(抹布).
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