问题
选择题
Some Maths problems in this book are difficult for the students work out.[ ]
A. so, that
B. not, but
C. such, that
D. too, to
答案
答案：D
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Some Maths problems in this book are difficult for the students work out.[ ]
A. so, that
B. not, but
C. such, that
D. too, to
答案：D