问题
选择题
| —Are you sure you have to? It's been very late. —I don't know _____ I can do it if not now. |
A. where B. why C. when D. how |
答案
答案：C
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| —Are you sure you have to? It's been very late. —I don't know _____ I can do it if not now. |
A. where B. why C. when D. how |
答案：C