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

A. has been asleep    B. has fallen asleep     C. has gone to bed       D. has gone to sleep


【答案】A

【解析】考查現(xiàn)在完成的用法。for eleven hours指一段時間，不可以用短暫性動詞，be asleep指“睡著”的狀態(tài)，fall asleep指“睡著”的動作 ，所以選擇答案A。


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