17._____ the plant once a week if you are to get fruit in the autumn.
| A. | Watered | B. | Watering | C. | To water | D. | Water |
16.Your parents are always there by you,_____you need them.
| A. | whenever | B. | however | C. | whatever | D. | whoever |
15.Since the middle of the last year,the bike-sharing market _____in Beijing.
| A. | boomed | B. | was booming | C. | will boom | D. | has boomed |
14.I was wondering _____you could come to join us to be the volunteers in the Winter Olympic Games.
| A. | what | B. | that | C. | whether | D. | why |
13._____ I make a promise to help others,I will manage to complete it.
| A. | Although | B. | Once | C. | Unless | D. | Before |
12.-I heard you wanted to have a further study in a foreign college.
-Yes,that's _____I try my best to learn English well.
-Yes,that's _____I try my best to learn English well.
| A. | when | B. | how | C. | wha | D. | why |
11.The professor _____about how to protect the endangered animal in the conference at this time tomorrow.
| A. | talked | B. | talks | ||
| C. | has been talking | D. | will be talking |
10.Experience is a hard teacher because she _____the test first,the lesson afterwards.
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| A. | gives | B. | has given | C. | was giving | D. | would give |