单项选择题

You should have put the milk into the refrigerator, I expect it ______ bad by now.

A．went
B．had gone
C．has gone
D．goes
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单项选择题
Nowhere but in the continuous research work ______ find the meaning of his life.
A．for him to
B．he can
C．he could
D．can he
单项选择题
If the whole framework of the thesis ______ beforehand, a great deal of time and energy would have been saved.
A．was designed
B．had been designed
C．were designed
D．has been designed
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