—Fifteen.

A.Where is my bag?B.Who's he?C.How many pears do you see?

【答案】C

【解析】

句意：—你看见了几个梨？—十五个。答句是数量，问句问数量用how many提问。A. Where is my bag?我的包在哪里？B. Who's he?他是谁？C. How many pears do you see?你看见了多少梨？故选C。