I get on the bus when I heard someone calling me from behind.’A. was toB. was going toC.

问题补充：

I get on the bus when I heard someone calling me from behind.’

A. was to

B. was going to

C. would

D. was about to

答案：

A. was to

B. was going to

C. would

(答案→)D. was about to

解析：was about to 意思是:正要,这句意思是:我刚要下车,这时我听到有人在后面叫我.所以选D选项同.