Service was included in the bill so you the waiter. It was a waste of money.A. will not

问题补充：

Service was included in the bill, so you the waiter. It was a waste of money.

A. will not tip

B. may not tip

C. needn have tipped

D. mustn have tipped

答案：

A. will not tip

B. may not tip

(答案→)C. needn have tipped

D. mustn have tipped

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