Question

—I phoned you at 9 this morning but got no answer.
—I am sorry. I _____ the bell. I _____ in the garden.

1. A.
   didn’t have heard, must have been
2. B.
   didn’t have heard, must be
3. C.
   didn’t hear, must have been
4. D.
   didn’t hear, must be

Answer 1

C
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
点评：此题主要考察考生对时态和must表推测的掌握程度和熟练情况，作答此类型题，应从时态本身代表的含义出发，平时复习应以理解为主，记忆为辅。