单项选择题

Busy ______ he is, he can fulfill the task ahead of schedule.

A．because
B．as
C．no matter how
D．although
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单项选择题
If only I ______ the books on the reading list before I attended the lecture.
A．read
B．have read
C．had read
D．could have read
单项选择题
Mr. Jack ______ volleyball in the afternoon, but now his leg wounded, ______ in the evening.
A．used to play; is used to taking a walk
B．used to playing; is used to take a walk
C．was used to playing; used to taking a walk
D．was used to play; used to take a walk
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