问题补充:
Some Math problems are difficult for the students work out.
A. so, that
B. not, but
C. such, that
D. too, to
答案:
A. so, that
B. not, but
C. such, that
(答案→)D. too, to
解析: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。