It’s a fine day today. Let’s around the park OK?A. walkingB. walkC. to walkD. walks

问题补充：

It’s a fine day today. Let’s around the park, OK?

A. walking

B. walk

C. to walk

D. walks

答案：

A. walking

(答案→)B. walk

C. to walk

D. walks

解析：使役动词let后跟动词原形作补语，故选B。