单项选择题

（）the medicine, my mother wouldn't have gotten better

A. As if
B. Had it not been for
C. Were
D. I wish

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单项选择题

Scarcely had he hung up the phone （）it rang a second time

A. but
B. as
C. than
D. for

单项选择题

（）you start to feel worse than before, you will need to go to the hospital

A. As
B. Had
C. Should
D. Would

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