单项选择题

Do be careful when you cross the street, （）you

A. don’t
B. aren’t
C. will
D. must

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单项选择题
—She didn’t come to school yesterday, did she —______, though she was not feeling very well.
A. No, she didn’t
B. Yes, she didn’t
C. No, she did
D. Yes, she did
单项选择题
The professor and writer （）coming to make a report on Chinese literature.

A. is
B. are
C. has
D. have
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