Question

英语练习题！谢谢！急

把下列句子变成主动语态
1.Spanish is spoken in South America.
2. The plans will have to be revised.
3. All the words must be looked up in a dictionary.
4. Has John been cured of his heart illness?
5. The door should not have been left open all night.
6. We are afraid that we may be attacked at night.
7. We are being taught how to operate the new machine.
用动词的正确时态填空
Our desks and chairs ________________ (make) of wood. The paper of books and newspapers ______ also ___________ (make) from wood. Even some kinds of cloth __________________ (make) from it. Many people ____________ (burn) wood to keep themselves warm in winter. Indeed, wood _______ (be) important in our everyday life.
Where ________ wood __________ (come) from? It ________________ (take) from trees which _____________(grow) in the mountains. _________ you ____________ (know) how it ____________ (get) to us from the mountains?
First of all, trees ___________(cut) down when they ______________(grow) big enough. Then their branches _______________ (cut) off, and logs _______________(make).These heavy logs ________________(put) together in different ways and _________________ (take) down to the foot of the mountains. Some of them _________________ (float使漂流) down the small rivers and others _________________ (carry) down on trains.
Big trees ________________(cut) down in the mountains every year. Then young ones ______________________ (must, plant) so that we ______ always ________________ (can, have) enough wood. We have to take good care of mountains so that they __________ always _________________ (may, cover) with growing trees

Answer 1

1. People in South America speak Spanish.
2. We will have to revise the plans.
3. I must look up all the words in a dictionary.
4. Have doctors cured John of his heart illness?
5. You should not have left the door open all night.
6. We are afraid that someone may attack us at night.
7. The teacher is teaching us how to operate the new machine.

are made; is; made; is made; burn; is; does; come; is taken; grow; Do; know; is gotten; are cut; grow; are cut; are made; are put; are taken; float; are carried; are cut; must be planted; can; have; may; cover.