The weather is fine. What about outside.A. have a walkB. to have a walkC. having a walkD.

问题补充：

The weather is fine. What about outside.

A. have a walk

B. to have a walk

C. having a walk

D. has a walk

答案：

A. have a walk

B. to have a walk

(答案→)C. having a walk

D. has a walk

解析：考察固定句式。What about……怎么样，about是介词，后面接名词或者动名词作宾语，故选C。