根据中文意思填空

问题描述:

根据中文意思填空
They always _____ _____ football when they are _______ the phone.
他们打电话时总是谈论足球.
(注:一空一词)

talk about onare是be动词,后面能直接接介词词组吗?可以, 介词短语作表语再如:He is in the classroomin the classroom 就是介词短语