单项选择题

He（） studied, yet he passed every exam.

A. frequently
B. little
C. regularly
D. rarely

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单项选择题

Though adults breathe twelve times a minute, breathing is so automatic （） the average person hardly ever thinks about it.

A. and
B. that
C. for which
D. in fact

单项选择题

Could you hold on a few minutes （） I check this with my boss

A. for
B. since
C. during
D. while

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