单项选择题

Smith ______ a book about China last year, but I don't know whether he has finished it.

A．has wrote
B．wrote
C．had written
D．was writing
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Many people agree that ______ knowledge of English is a must in ______ international trade today.
A．a; /
B．the; an
C．the; the
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单项选择题
Shall we stay at school or ______to the park
A．to go
B．go
C．going
D．went
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