2. 外语
  3. Mike looks so sleepy in the class; he ______ up last night.

Mike looks so sleepy in the class; he ______ up last night.

admin2010-05-25  23
问题 Mike looks so sleepy in the class; he ______ up last night.
选项 A、must stay
B、should have stayed
C、must have stayed
D、is sure to stay
答案C
解析 情态动词题。表示对过去某一动作行为的确定的猜测用must have done这一句型。
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