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. |