— go to the Great Wall this Sunday?—I’m afraid it is not a good idea. Many of us have been

问题补充：

— go to the Great Wall this Sunday?

—I’m afraid it is not a good idea. Many of us have been there.

A. Why not

B. What about

C. Would you like

D. You’d better

答案：

(答案→)A. Why not

B. What about

C. Would you like

D. You’d better

解析：Why not为何不……；What about……怎么样，后面接名词或者动名词； Would you like你想不想，后面一般接名词或者不定式；You’d better你最好……，为肯定语气。根据后面动词go及语境可知选A。