I’d appreciate ________ if you could let me know in advance whether or not you will come.
A．it B．you
C．one D．this
A
【详解】
考查it用法。句意：如果你能提前告诉我你是否会来的话，我将非常感激。appreciate后跟接if或when从句时，其后不直接跟if或when引导的从句，若语义上需要接这类从句，需借助it，it作形式宾语。故选A。
【点睛】
使用appreciate的四点习惯
1）习惯上不接不定式作宾语，其后可接名 (代)词、动名词、名词性从句等作宾语，但不能接不定式。如：
We shall appreciate hearing from you again.能再次收到你的来信，我们将十分感激。
I appreciate that you have come here so early. 感谢你来得这么早。
2）习惯上不用“人”作宾语，其后只能接“事”作宾语，而不能接“人”作宾语 (注意：这与thank 的用法恰恰相反)。
正：I appreciate your kindness. 谢谢你的好意。误：I appreciate you for your kindness.
正：He thanked her for her kindness. 他感谢她的好意。误：He thanked her kindness.
3）后接if或when从句时习惯上要先接it。其后不直接跟if或when引导的从句，若语义上需要接这类从句，需借助it。
如：I would appreciate it very much if you would help me with it. 如果你能帮助我做这事，我会十分感激。
We really appreciate it when she offered to help. 她来帮忙了，我们十分感激。
4）关于修饰语的搭配习惯，要表示程度，可用 deeply, highly, (very) much 等副词修饰。如：I deeply appreciateyour kindness. 我深深感谢你的好意。
He highly appreciated their help. 他非常感谢他们的帮助。
注意：much 修饰 appreciate时，只能置于其前，而不能置于其后但 very much 却可以)。如：我们非常感谢你的邀请。正：We much appreciate your invitation.正：We appreciate your invitation very much. 误：We appreciate your invitation much.
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