Tom is a speaker. He is used to in public.A. speak B. speaks C. speaking

问题补充：

Tom is a speaker. He is used to in public.

A. speak B. speaks C. speaking

答案：

解析：句意: Tom是一个演讲家。他习惯了在公众场合讲话。这里的be used to 的意思是习惯于…，后面应该跟动词的ing形式，故选C。be used to do sth. 的意思是被用来做某事；used to do sth. 意思是过去常常做某事。