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plant B. to plant C. planting ( )2. Trees can keep cool. A. us B. we C. our ( ) weather is getting in August. A. more hot B. hoter C. hotter ( )4. We should not cut trees. A. off B. up C. down ( ) 5. There are books in our library. A. many and many B. more and more C. some and some 五 . 用所給單詞的適當(dāng)形式填空。 1. There (be) more and more cars now.. 2. The weather is (change). 3. You need (go) home now. 4. I often help my mother (do) housework. 5. (plant) trees is good for us. 綜合提升 六 . 根據(jù)漢語意思補全句子。 1. 路越來越多了。 There are roads. 2. 地球正在變得越來越熱。 The Earth is . 3. 為什么人們砍樹? do people trees? 4. 我們需要每天鍛煉身體。 We every day. 5. 我們應(yīng)該照顧它們。 We should .