题目内容：
He looks so tried this morning. He ____last night.
A.must stay up late
B.must have stayed up late
C.was staying up late
D.has stayed up late
参考答案：
选择题：He looks so tried this morning. He ____last night.
- 题目分类：河南师范大学-行政管理（本科）-大学英语Ⅱ
- 题目类型：选择题
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He looks so tried this morning. He ____last night.
A.must stay up late
B.must have stayed up late
C.was staying up late
D.has stayed up late