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
Under this ______ pressure some of the rocks even became liquid.
A．intensive
B．weighty
C．intense
D．bulky
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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