问题
填空题
| 选用方框中所给词的适当形式填空，完成句子。 | |
2. The children ______ in their father's shop when things are busy.. 3. They _______ all the milk, they need to buy some.. 4. The machine doesn't work, they ______ urgent repairs now. 5. We must not let them _______ such fine trees just to build a road. |
答案
1. clean up 2. help out 3. have used up 4. are carrying out 5. cut down