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I would appreciate it _______ you call back this afternoon for the doctor’s appointment.?
A.untilB.if?
C.whenD.that?
B?
从结构上说,句中的if从句是条件状语,但它与would连用,表示委婉提出请求,是语气非常客气的祈使句,意思是“请你下午回个电话说明就诊的时间好吗?”。
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