单项选择题

You should have put the milk into the ice-box, I expect it ______ undrinkable by now.

A．became
B．had become
C．has become
D．becomes

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单项选择题

I understand ______ preparation that staff must put in under pressure to meet the deadline.

A．more than the enormous amount of
B．better than most the enormous number of
C．better than most the enormous amount of
D．fewer than the number of

单项选择题

You should have your eyes tested every year in case the ______ of your spectacles need changing.

A．lenses
B．glasses
C．sights
D．crystals

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