原题:
题型:单项选择-四个选项
---_________ a day do you brush your teeth? ---Twice.
| A.How often | B.How much |
| C.How many times | D.How long |
题目考点:询问频率的表达方式
| A.How often | B.How much |
| C.How many times | D.How long |
题目考点:询问频率的表达方式
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