matters most in learning English is enough practice.A. What　　　B. WhyC. Where　D. Which

问题补充：

matters most in learning English is enough practice.

A. What

B. Why

C. Where

D. Which

答案：

(答案→)A. What

B. Why

C. Where

D. Which

解析：考察连词，根据句子结构可知，该句为主语从句，从句中缺少matters的主语，所以选择WHAT。

句意为，在英语学习中最重要的是足够的训练