Question

—I phoned you at 9 this morning but got no answer.

—I am sorry. I _____ the bell. I _____ in the garden.

A．didn’t have heard, must have been	B．didn’t have heard, must be
C．didn’t hear, must have been	D．didn’t hear, must be

Answer

C

【解析】

试题分析：情景对话 句意为：--今天早上九点我给打了个电话不过没人答复

--很抱歉。没有听见电话声。我那时一定在花园吧

一般过去时：简单陈述一件过去发生的事，强调事件本身。Must have done 是must对过去事件的肯定推测，这个事件肯定发生了，所以用完成时。结合语境可知，选C.

考点：对动词时态和语态进行考察