Question

The children ______ a P.E. class on the playground when it began to rain suddenly.

A．have

B．are having

C．had

D．were having

Answer 1

D

试题分析：句意：但开始下雨时孩子们正在操场上上体育课。当一个动作发生时，另一个动作正在发生，该动作用进行时态，根据句意，故用过去进行时，故选D。