—Mr Jones.

A.Who your science teacher

B.Who's your science teacher

C.How is your science teacher

【答案】B

【解析】

句意：—……？—琼斯老师。根据答语指某人，问句用疑问词who谁引导，be用is。与选项B谁是你的科学老师？相匹配。故选B。