the first thing when you go to school is _ the teacher a,greeting b,to greet c,greet d,greeted

问题描述:

the first thing when you go to school is _ the teacher a,greeting b,to greet c,greet d,greeted
选A还是B呢

B
这个结构相当于分开的:the first thing to do
第一件要做的事.