问题
选择题
Some Math problems are difficult for the students work out.
A．so, that
B．not, but
C．such, that
D．too, to
答案
答案：D
题目分析：句意：一些数学难题对于学生太难而算不出来。so…that such…that ,如此……以至于……。that后加从句。not,but。不是……而是。too,to太……而不做……。根据句意，故选D。