单项选择题

The chemistry class () for five minutes when we hurried there.

A. had been on
B. was on
C. has been on
D. would be on

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单项选择题
My friends arrived suddenly with nowhere to stay so I put them () for the night.

A. up
B. in
C. out
D. down
单项选择题
Give the books to______needs them for the English class and the writing class.
A. whomever
B. whom
C. who
D. whoever
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