The plane was _______ at nine this morning ,but there was heavy rain .

问题描述:

The plane was _______ at nine this morning ,but there was heavy rain .
A .to take off B .to have taken off C .taken off D .be taken off

A
be to do表将要,应该
飞机应该将要在九点起飞,但有场大雨(阻止了)