Question

---What were you doing at this time last night?
--- I _________ a phone call.

A．made

B．will make

C．has made

D．was making

Answer 1

D

考察时态。联系上文，昨天这个时候你正在做什么？可知下文描述的是过去某时正在进行的动作，故用过去进行时态，选D。