_____you have to do the job, you should try your best to do it well even though

题干

_____you have to do the job, you should try your best to do it well even though it may be very difficult for you.

A．Since

B．While

C．Unless

D．Though

上一题下一题 0.85难度单项选择更新时间:2013-06-26 08:39:06

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