1. The ____________ (organize) now has 18 000 members all over the world.
2. Boys, your time is ____________ (limit), so please hurry up.
3. The ____________ (different) between the two pictures are easy to find.
4. Does everybody know the ____________ (important) of protecting the Earth?
5. Be ____________ (严肃的) for a moment. It's important.
6. Becky ____________ (明智地) decided to tell us the truth.
7. We all know that our country is rich in natural ____________ (资源).
8. He was ____________ (罚款) by the police because of running a red light.

1. organization 2. limited 3. differences 4. importance 5. serious 6. wisely 7. resources 8. fined

( ) 1. The Amazon rainforest, which covers an area of 2.1 million square miles, is known as the lungs (肺) of the Earth, because it ________ 20% of our oxygen (氧气).
A. pollutes B. plants C. produces D. prevents
( ) 2. In the old days, the workers were often made ________ over ten hours a day.
A. work B. working C. to work D. works
( ) 3. — When can we have dinner, Mum? — Not until it ________ in an hour.
A. is prepared B. will be prepared C. has been prepared D. was prepared
( ) 4. Make a note of the questions you want to ask when you go over your lessons. ________, you will surely forget some of them.
A. Moreover B. Anyway C. However D. Otherwise
( ) 5. — Shall we go for a picnic tomorrow? — Well, it all ________ the weather.
A. leads to B. depends on C. happens to D. turns on
( ) 6. Things like glass and plastic ________ into different groups in our school.
A. separate B. separated C. are separated D. is separated
( ) 7. I'm afraid that this type of energy will ________ if we continue wasting it.
A. run out B. break out C. come down D. fall down
( ) 8. — Did you notice the students ________ a few why questions in Mr Zhang's class?
— Yes, I think he wanted to train their abilities of thinking.
A. are asked B. must be asked C. were asked D. have been asked
( ) 9. Fishing ________ in order to protect the ecosystem (生态) of the Yangtze River.
A. allows B. is allowed C. isn't allowed D. won't allow
( ) 10. — I think we should produce less rubbish. — ________.
A. I agree with you B. That's all right C. It's kind of you D. Thank you

1 - 5 CCADB 6 - 10 CACCA

1. Last year, a large number of trees in this area ____________ (cut) down to make space for two new factories.
2. The terrible flood ____________ (cause) a great loss (损失) to the farm since last week.
3. I'm sure the singer's new piece of music ____________ (love) by a lot of young people.
4. Do you hear someone ____________ (sing) in the next room?
5. Don't discuss the problems with your partner until you ____________ (ask) to.
6. All of these books ____________ (separate) into different types as soon as they were collected.

1. were cut 2. has caused 3. will be loved 4. singing 5. are asked 6. were separated