问题描述：
又一个非谓语动词选择题
Look,the building _______ is our library.
A.is repaired B.being repaired
C.repairing D.to be repairing
为什么选B不选A呢?选B没有谓语啊?
Look,the building _______ is our library.
A.is repaired B.being repaired
C.repairing D.to be repairing
为什么选B不选A呢?选B没有谓语啊?
问题解答：
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