单项选择题

His illness was ______ to overwork.

A．responsible
B．reason
C．due
D．because
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单项选择题
______ is a great virtue.
A．The wisdom
B．Wisdom
C．Wisdoms
D．A wisdom
单项选择题
—I drove from New York yesterday. —What time ______ Boston
A．did you reach
B．have you reached
C．you reached
D．you have reached
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