单项选择题

It was about 150 years ago ______ Dalton put forward the important idea.

A. when
B. that
C. at which
D. \
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______ who caused you to serve dinner an hour later than usual
A. Was he
B. Did he
C. Had he
D. Was it he
单项选择题
Here ______ the nine noisy children in the field.
A. comes
B. coming
C. come
D. is coming
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