He is an outgoing boy and can most of the other boys in the class.A. keep up withB. fit

问题补充：

He is an outgoing boy, and can most of the other boys in the class.

A. keep up with

B. fit in with

C. come up with

D. deal with

答案：

A. keep up with

(答案→)B. fit in with

C. come up with

D. deal with

解析： keep up with 赶上，fit in with 与人和睦相处，come up with提出，deal with处理，句意：他是一个外向的男孩，能和班里的大多数男孩子和睦相处。故选B。