The children decide their school yard this Friday afternoon.A. cleanB. to cleanC. cleanin

问题补充：

The children decide their school yard this Friday afternoon.

A. clean

B. to clean

C. cleaning

D. cleaned

答案：

A. clean

(答案→)B. to clean

C. cleaning

D. cleaned

解析：句意：这个星期五下午，孩子们决定打扫他们的校园。动词不定式做宾语表示具体的将要进行的动作，结合语境可知选B。