单项选择题

The party began at eight. So they （）dine at seven.

A. may
B. must
C. ought to
D. should

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单项选择题
The baby smiled when（）saw （）mother.

A. he ... its
B. it ... his
C. it ... its
D. she ... its
单项选择题
3（）

A.assignments
B.information
C.content
D.definition
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