| We must try our best to keep the factory _____ the waste water into the river. |
A. from pouring B. to pour C. poured D. pour |
| Could you tell me _____ the bike without any help this morning? |
A. how does he fix B. how he fixes C. how he fixed D. how did he fix |
| Can you tell us _____? |
A. if your father does B. what does your father do C. your father does what D. what your father does |
| They _____ 3000 English words since three years ago. |
A. learned B. had learned C. will learn D. have learned |
| －John speaks Chinese quite well. －So he does. He practices _____ Chinese every day. |
A. speaking B. speak C. speaks D. to speak |
| －What does your cousin look like now? －Oh, he is much _____ than before. |
A. strong B. stronger C. strongest D. too strong |
| I want to know if Allen _____ to the party. Please tell me if he _____. |
A. comes; comes B. will come; will come C. comes; will come D. will come; comes |
| The temperature of our earth will become higher and higher _____ we take actions right now. |
A. unless B. if C. as soon as D. as |