题目内容

(3) George has been invited to attend an exposition.

A. 对
B. 错

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George has to pay duty on his laptop computer.

A. 对
B. 错

Articles for commercial use are subject to duty.

A. 对
B. 错

Mary will go with Mr. Smith on the business trip.

A. 对
B. 错

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A. 对
B. 错