The noise of the desks (A) could be heard in the next classroom.A.being opend anf closed B.opend anf closed C.having been opend anf closed D.to be opend anf closed为什么选A?选B不行?

问题描述:

The noise of the desks (A) could be heard in the next classroom.
A.being opend anf closed B.opend anf closed C.having been opend anf closed D.to be opend anf closed
为什么选A?选B不行?