英语单选1353:I think the first thing you should do is
问题描述：
英语单选1353:I think the first thing you should do is
I think the first thing you should do is ___ to your teacher for what you have done
A.apologizing
B.to apologize
答
B
当thing,job等 做主语时,表语往往用不定式.
you should do 是thing的定语.