◎ 题干
I would appreciate ______ you call back this afternoon for the doctor’s appointment.
[     ]
A.if  
B.that  
C.it if  
D.it that
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I would appreciate ______ you call back this afternoon for the doctor’s appointment.[ ]A.ifB.thatC.it ifD.it that…”主要考查了你对  【从属连词】【it的用法】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。