______ hard and you will catch up with your classmates . [ ]A. Study

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______ hard and you will catch up with your classmates .    [     ]
A. Study
B. Studying
C. To study
D. Studies

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举一反三

______ volleyball here, ______ you may break the windows. [     ]
A. Play, or
B. Don"t play, or
C. Play, so
D. Don"t play, so

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Let"s ________ at six o"clock.[     ]
A. goes
B. going
C. go
D. to go

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____ to bring your homework tomorrow![ ]
A. Not forget
B. Aren" forget
C. No forget
D. Don"t forget

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______on the river. It is not safe. [ ]
A. Don"t skating
B. Don"t skate
C. Skate
D. Not skate

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用括号里的词汇和短语填空

1. Don"t ________ to turn off the gas when you finish cooking.
2. Three years ___________ since Tom came to China.
3. Is everything ________ the party. Our friends are coming soon.
4. If you feel uncomfortable, __________ see a doctor?
5. _______ I"m free, I won’t go swimming. It"s too cold.

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