As I'll be away for at least a year, I'd appreciate ________ from you now and then telling me how everyone is getting along．A.hearingB.to hearC.to be hearingD.having heard
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A解析appreciate(感激)后面用动名词作宾语，所以所给选项中可以排除B、C两项。主句中的now and then(时常)表明本句的动名词应用一般时，所以排除D项。剩余的A项为正确选项。