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單項選擇題

All of our customers will be contacted（）

A.by mail
B.by the mail
C.by mails
D.by a mail

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Please（）to get there on time.

A.make effort
B.make efforts
C.make the efforts
D.make an effort

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Nothing can compensate me（）the loss of my wife.

A.for
B.on
C.to
D.with

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