I can't come here.( ),I‘m too busy these days.Besides,I’m not interested in this activity.

问题描述:

I can't come here.( ),I‘m too busy these days.Besides,I’m not interested in this activity.
A.At first B.To begin with 为什么是B呀?

At first 和 second 或者 then连用
To begin with 和 besides 连用
就是说他们都是配套的
如果还有问题,可以问我,