问题 填空题
用方框中所给单词的适当形式填空。
pass   pollution   he   waste   develop
1. Air _______ is the most serious problem at the moment.
2. As we know, China is still a _______ country in the world.
3. Bruce succeeded in _______ the English exam.
4. Water is becoming less and less, so you aren't supposed to _______ every drop of water.
5. My grandpa has seen the changes in Lianjiang _______.
答案

1. pollution  2. developing  3. passing  4. waste  5. himself

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