important to learn English well.A. That’sB. It’sC. It hasD. That has

问题补充：

important to learn English well.

A. That’s

B. It’s

C. It has

D. That has

答案：

A. That’s

(答案→)B. It’s

C. It has

D. That has

解析：It is + adj.+ to do sth. 是常用句型，it作形式主语。本句需要用形式主语，故选B。