单项选择题

(Many) a problem concerning the agricultural (production) (have been) solved (this way).()

A. Many
B. production
C. have been
D. this way

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单项选择题

Mr. Wang is the (only one) of the teachers (in) our university (who) (own) a car.()

A. only one
B. in
C. who
D. own

单项选择题

A.hide
B.set
C.fix
D.lie

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