【題目】— does your grandpa do exercise?

—Every day.

A. How soon B. How long C. How often

【答案】C

【解析】句意：－你爺爺多久鍛煉一次？－每天。A. How soon多久，多快。詢問動(dòng)作在多快能完成，常用于一般將來時(shí)態(tài)，答語一般為in+時(shí)長；B. How long多久，多長時(shí)間。問動(dòng)作或狀態(tài)持續(xù)的長度；C. How often多久一次，問頻率。本題答語every day每天，描述的是動(dòng)作發(fā)生的頻率，用how often提問。故選Ｃ。

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