问题
选择题
| — _______does he brush his teeth a day? — Twice. |
A. What time B. How long C. When D. How many times |
答案
答案：D
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| — _______does he brush his teeth a day? — Twice. |
A. What time B. How long C. When D. How many times |
答案：D
费不可分割，二者相互起决定作用