单项选择题

Only since they gave up that good chance ______ to show their invention again.

A. have they had no chance
B. they have had no chance
C. they have no chance
D. have they no chance
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单项选择题
Hardly had she walked out of the woods ______ she heard the strange scream coming from behind a tree.
A. than
B. until
C. since
D. when
单项选择题
She didn't come to the party last Sunday．______，she must have made the party more exciting．
A．If she came
B．Would she come
C．Had she come
D．Did she come
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