问题

I_ my homework when the door bell____.

A:did, rang
B:was doing, was ringing
C:did, was ring
D:was doing, rang

正确答案是：

标签： did , doing , was

同类题型

I don’t know her name. He doesn’t know, .

Shall we go out for a swim?—Sorry, I can’t. I ______ housework for my mother now.

________do you do morning exercises?—Every morning.[ ]

Jim works hard at his Chinese, and _________.[ ]

My father is able to _______many different kinds of computers.