单项选择题

Generally speaking, all kinds of materials will expand when heated but will ______ when cooled.

A．contrast
B．contract
C．survive
D．return
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单项选择题
They are going to build a big office block on that ______ piece of land.
A．void
B．blank
C．vacant
D．hollow
单项选择题
The examination wasn't very difficult, but it was ______ long.
A．too much
B．very much
C．so much
D．much too
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