Do you often dream at night? How do you feel when you dream? Is it useful to our health?  “Dreams may be more important than sleep, and we all need to dream,” some scientists say.
Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams are like short films. They are usually in colour. Some dreams are like old films. They come to us over and over again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer. Some people get new ideas about their work from dreams. They may have been thinking about their work all day. These thoughts can carry over into dreams.
Sometimes we wake up with a good feeling from a dream. But often we can't remember the dream. Dreams can disappear quickly from memory (记忆).
Too much dreaming can be harmful（有害的） . The more we sleep, the longer we dream. The mind is at work when we dream. That is why we may have a long sleep and still wake up tired.
The first paragraph(段落) tells us that dream is very                     .

A．interesting	B．important
C．useful	D．harmful

It takes people about                 to dream every night.

A．one quarter of their sleeping time

B．a whole night

C．half of their sleeping time

D．one or two minutes

When a dream comes to somebody again and again, it shows             .

A．he often does the work about the dream

B．somebody misses him very much

C．the dream is very important to him

D．he is worrying about something

According to（根据） the passage, we know dreaming can              sometimes.

A．hurt us badly

B．let us think over and over

C．help us find new ideas

D．wake us up early

The passage mainly tells us              .

A．what a dream is

B．dreams are like films

C．too much dreaming is harmful

D．we can remember our dreams