问题

The children _______ a PE classon the playground when it suddenly began to rain.

A:have
B: are having
C:had
D:were having

正确答案是：

同类题型

下列各句中加点词的解释不完全正确的一项是（）

Nelson Mandela was of South Africa from 1994 to 1999.

I’m sorry I didn’t phone you, but I’ve been very busy_____ the past couple of weeks

I regret____ to tell ____you that John has beenfired.—I can hardly believe my ears. He is such a fineworker.

There is no possibility, I guess, _____our exam will be put off.