天津市武清区杨村中考英语复习 被动语态课件.ppt

( ) 1. Scientists are trying to bring ____ to the deserts. A. food B. planes C. water D. animals ( ) 2. The ____ are important to protect the soil. A. rain B. trees C. land D. wood C B ( ) 3. In most places after the trees are cut down, ____________. A. they can grow again B. they will disappear forever C. new trees can grow better D. new forests will appear B ( ) 4. The reason for the bad cycle(循环) is that _________. A. people need more land to grow food B. wood is needed for building houses C. there are too many rich people on the land D. there are too many people on the earth D A great deal of water is needed in large cities. Some cities pump(抽水）water from wells. Some cities g__ water from lakes or rivers n______. But some cities have to bring water from lakes or rivers many miles away. Complete the passage: et earby Water is usually b_______ to a city from a place higher than the city itself. When water is f_____ only in the lower place, it must be pumped up to the city. Then it is s____ to each home. Dams(水坝) are often b___ in a river to keep the water from flowing away. rought ound ent uilt Then a new lake is formed. The city knows how much water will be n_____ and allows the extra(额外的) water to flow below the dam. I __ this way, the city stores water for its use. There is usually a b_______ near the dam. Much important work is d___ there. For example, the water is tasted before it is piped to the city. eeded n uilding one Fill in the blanks with the verbs using right tenses and voices: 1. Large numbers of plastic bags _______ (use) in the supermarkets every day. 2. ___ our country ____(send) up another man-made satellite last year? 3. Must the old people _________ (speak) to politely? are used Did send be spoken 4. Her grandma was still alive when he _________(take) to the hospital.