单选题Themedicineshouldbetaken________,a

单选题 The medicine should be taken ________, and ________.A.three pills once; three times one dayB.three pills at a time; three times in a dayC.three pills a time; three times a dayD.three pills at a time; at three times in a day

C

我明天再问问老师，叫他解释下这个问题