单项选择题

Sarah （）the laundry when Nick stopped by to say hello

A. was doing
B. had done
C. does
D. has done

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单项选择题

Jack and Lynn will （）married for thirty years tomorrow

A. have
B. be
C. become
D. have been

单项选择题

Don't wait for me. I （）come back until late tonight

A. will
B. did
C. won't
D. didn't

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