happened to be no one in the building when the fire broke out.
A. It
B. There
C. This
D. That
网友回答
A. It
B. There
C. This
D. That
解析：there be 句型和happen连用表示碰巧有-----=
There was no one in the building when the fire broke out.
Do you expect there to be a possibility that Palestine and Israel will make a peace agreement after
Yasser Arafar died.