-Doctor,________ should I take this medicine?

-Twice a day.

[  ]

A.

what time

B.

how much

C.

how soon

D.

how often

答案:D
解析:

  what time意為“什么時(shí)間”;how often表示“多久一次”,指動(dòng)作的頻率;how soon表示“還要多久才……”,一般用于將來時(shí),回答用“in…”; how much表示“多少”,后面接不可數(shù)名詞。而答語Twice a day.表示頻率,故選D。


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