You pay too much attention to your reading skill. It's so important.A. cannotB. shouldC.

问题补充：

You pay too much attention to your reading skill. Its so important.

A. cannot

B. should

C. must

D. needn

答案：

(答案→)A. cannot

B. should

C. must

D. needn

解析：cannot/never too，为固定句式、表示“怎么……也不过分，”“越……越好”，如:You cannot be too careful in your work.越细心越好。