单选题 In learning a foreign language, ______ English, one should first pay attention to speaking, which is the groundwork of reading and writing.
A. says B. say C. to say D. saying

【正确答案】 B
【答案解析】[解析] say这里的意思是for example，是一种习惯用法，用作插入语，属于口头用语。