【題目】--Your dog knows a lot of tricks. ________ do you train him?

--Only about ten minutes every day.

A. How longB. How oftenC. WhenD. Why

【答案】B

【解析】

句意:——你的狗知道很多把戲。你多久訓(xùn)練它一次?——每天只有十分鐘左右?疾橐蓡(wèn)詞組辨析。根據(jù)答語(yǔ)Only about ten minutes every day. “每天只有十分鐘左右!笨芍,上文是對(duì)發(fā)生的頻率進(jìn)行提問(wèn),所以用特殊疑問(wèn)詞組howoften“多久”,故答案選B。

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