There are some birds in the picture __ the classroom.请问下横线上用什么介词?

问题描述:

There are some birds in the picture __ the classroom.请问下横线上用什么介词?
A in
B on

用in,如果后面搭配的是在墙上,那么就用on、这里指的是在一个空间里,所以就用in~