单项选择题

It is the third time that I () here.

A. was
B. am
C. have been
D. had been

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单项选择题

Our teacher says that()is not right for us to break the rules of the school.

A. /
B. this
C. it
D. that

单项选择题

不同的一项是（）

A.autumn
B.august
C.aunt
D.astronaut

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