问题描述：
句中being作什么成分
The village seemed deserted,the only sign of life ____ some trees waving ni the howling wind.
A.were B.being C.was D.to be
为什么不用were?
The village seemed deserted,the only sign of life ____ some trees waving ni the howling wind.
A.were B.being C.was D.to be
为什么不用were?
问题解答：
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