高中英语非谓语动词单选,

问题描述:

高中英语非谓语动词单选,
Tom was relying on there ( )another opportunity.
A.is B.being C.to be d.are
为什么?

rely on doing something.---rely on there being
如果想选A 全句为Tom was relying on (that) there ( is )another opportunity.