一 Did you hear Tom was criticized for his spelling mistakes in his English composition?

一 Yes, but a more careful person _____ so many mistakes. [ ]

A. wouldn't make

B. needn't have made

C. shouldn't make

D. wouldn't have made

对艾滋病死亡患者的尸检可以发现有中枢神经系统病理改变的占（）

A.30%～40%

B.50%

C.10%～27%

D.80%以上

E.100%