问题
选择题
They are __ the old houses in order to set up a new teaching building.
A．tearing down
B．tearing up
C．putting up
D．putting down
答案
答案：A
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They are __ the old houses in order to set up a new teaching building.
A．tearing down
B．tearing up
C．putting up
D．putting down
答案：A