单项选择题

I'll lend you my computer _______you promise to take care of it.

A． unless
B． as
C． while
D． if
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单项选择题
Which do you think is _______important, wealth or health
A． more
B． most
C． the more
D． the most
单项选择题
The students _______their papers by the end of this month.
A． have finished
B． will be finishing
C． will have finished
D． have been finishing
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