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In the U.S, a tip is thought to be polite when paying the bill.A.leaveB.having l

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In the U.S, a tip is thought to be polite when paying the bill.A.leaveB.having l

In the U.S, ______a tip is thought to be polite when paying the bill.

A.leave

B.having left

C.leaving

D.being left

试题答案

C

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