问题
选择题
| Some physics problems in this book are _____ difficult for the students _____ work out. |
A. not; but B. so; that C. such; that D. too; to |
答案
答案：D
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| Some physics problems in this book are _____ difficult for the students _____ work out. |
A. not; but B. so; that C. such; that D. too; to |
答案：D