单项选择题

The drowning boy made a （） attempt to catch the rope thrown to him.

A. dangerous
B. graceful
C. gentle
D. desperate

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单项选择题
I’m very grateful for your help and hope to do something for you （） in the future.

A. in exchange
B. instead
C. in return
D. in particular
单项选择题
（） by a large audience, he felt very nervous and didn’t know what to say.

A. Watching
B. Watch
C. Watched
D. Having watched
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