问题
选择题
| We don't know why _____ many students made _____ careless mistakes. |
A. so; so B. so; such C. such; so D. such; such |
答案
答案：B
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| We don't know why _____ many students made _____ careless mistakes. |
A. so; so B. so; such C. such; so D. such; such |
答案：B