Question

The astronaut is so tired that he ________ for eleven hours.

A. has gone to bed    B. has been asleep

C. has gone to sleep    D. has fallen asleep

Answer

B

【解析】句意：那名宇航员是如此的累以至于他已经睡了11个小时了。本句是现在完成时态，后面跟for引导的时间段，动词要用延续性动词，只有be asleep表示状态，故答案选B。

点睛：短暂性动词在现在完成时态的肯定句中不能与表示一段的时间状语连用，如本句中的go, fall为短暂性动词，另外还要记住几个常见的短暂性动词与延续性动词的转化：borrow→keep, buy→have, get/catch a cold→have a cold ，die→be dead, open→be open，end/finish → be over, begin/start→ be on, leave→be away, come→be in/here等。

如：His father died 10 years ago. = His father has been dead for 10 years。

I bought this pen 3 years ago. = I have had this pen for 3 years.