—Mom my classmates invited me a field trip. May I go with them?—OK. A. go onB. to go onC

问题补充：

—Mom, my classmates invited me a field trip. May I go with them?

—OK.

A. go on

B. to go on

C. go in

D. to go in

答案：

A. go on

B. to go on

C. go in

(答案→)D. to go in

解析：go on继续，发生；go in进去，参加。句意：妈妈，我的同学们邀请我参加一个郊游。我可以和他们去吗？——好吧。Invite后接带to的不定式做宾语，表示具体的将要进行的动作，结合语境可知选D。