You out last night. I called you several times, but nobody answered. A. must hav

You _____ out last night. I called you several times, but nobody answered.

   A. must have been     B. must be       　 C. might have been  D. could be

试题答案

A

题意为“我昨天晚上打了几次电话都没有人接，你一定是出去了”。must have done常用来表示对过去发生情况的肯定推测。