单项选择题

The old woman would have been drowned ______ a passer-by dragged her out of the water.

A. but for
B. but that
C. without
D. if
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单项选择题
She was the only one of the few girls who （） passed the examination.

A. was
B. were
C. has
D. have
单项选择题
（）, glasses can correct most sight defects in healthy eyes.

A. When well-fitted
B. If well-fitting
C. When well-fitting
D. If well-fitted when
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