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单选题 交通银行
2016-05-07

Contests that promise cash prizes for winners are often used by employer to__________their workers.

A.predict
B.transfer
C.discharge
D.motivate

参考答案

D

答案解析

选项为各种动词,空格前直接就有to,因此构成“to+空格”结构的to不定式。