Question

【题目】— do you clean your school reading room, Jack?
— Twice a day.
A.How much
B.How long
C.How often
D.How many

Answer 1

【答案】C
【解析】句意；“-杰克，你们多久打扫阅览室一次？-一天两次”。A,How much,多少对不可数名词提问或对价格提问B,How long多久，对时间段提问C,How often多久一次，对频率提问；DHow many多少，多可数名词复数提问。根据句意，提问频率，故选C。