you may surf the interent if your workA has done B have done C will be done Dis donr

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you may surf the interent if your workA has done B have done C will be done Dis donr
you may surf the interent if your work
A has done B have done C will be done Dis donr

you may surf the interent if your workA has done B have done C will be done Dis donr
D被动,主将从现
如果你的工作做完的话你就可以上网.

a
如果你工作完成了,可以在网上冲浪。

A
现在完成时,表示已经完成

D. You may surf the internet if your work is done.
从句中your work作主语需用被动态,排除A.B.
从句一般不用将来时,排除C.