单项选择题

We were swimming in the lake suddenly the storm started.

[A] when
[B] while
[C] until
[D] before
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单项选择题
It is an exciting moment for Chinese people this year，______for the first time the Olympic Games will be held in China．
[A] that
[B] while
[C] which
[D] when
单项选择题
-I'm taking my driving test tomorrow． -______!
[A] Cheers
[B] Good luck
[C] Come on
[D] Congratulations
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