题目内容

根据汉语提示,在句中填写适当的短语。
1. We must_____(保护环境)around us in order to make our homeland more beautiful.
2. Everyone of us should devote ourselves to keeping           (生态平衡).
3. Let's       __ (收拾干净)the broken glass before someone walks on it.
4. It is everyone's duty to save the    _    (能源).
5. We often      __  (利用)these waste things to make something else.
l. protect the environment   2. the balance of nature   3. clean up  
4. energy souse  5. make use of
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