I’m so sleepy. I’ve been awake____4:00 this morning.
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Kyoko was an exchange student in Peru ____a whole semester.
Marcus has lived in Dubai ____2010.
How are you? I haven’t seen you ____high school.
office2010，一个excel文件可以有多少张工作表？
A. 1
B. 3
C. 255
D. 几万
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