The passage is so difficult that he couldn't understand it．Which of the following is RIGHT？
A.The passage is too difficult for him to understand it．
B.The passage is not easy enough for him to understand．
C.The passage is not easy enough for him to understand it．
D.The passage is too easy for him to understan
网友回答
B解析分析：so…that从句是否定句，可以改为too…to…或not enough to…结构，但A项和C项后面多了it，D项的形容词easy用错，所以选B项。