Question

—Can you tell me if Tom has finished his homework?
—I've no idea. He ________ it this morning.

A．has being doing	B．had done
C．is doing	D．was doing

Answer 1

D

答案：D　考查动词时态。句意为：——你能告诉我Tom是否完成家庭作业了？——我不知道。今天早上他正在做。根据答语可知，做作业的动作发生在过去，强调的是当时的动作正在进行，因此用过去进行时。故D项正确。