I'd ______ it if you could let me know in advance whether or not

I'd ______ it if you could let me know in advance whether or not you will come. （appreciation）
【正确答案】：appreciate
【题目解析】：该题中空格处需要填入的词作谓语，且用在助动词’d（即would）后，故需要用appreciation的动词形式appreciate。