把下列句子变成被动语态1.We found some jewels in a box.2. The teacher is keeping the pupils at school for a revision.3. James has left a parcel for you.4. You must finish the article before Friday.5. They will not paint the house again next year.6. They promised Mary a new doll for her birthday.7. I have told the children many times not to skate on the pond.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. T...
