N( ) is in the school after school.It is very quiet.

N( ) is in the school after school.It is very quiet.
N( ) is in the school after school.It is very quiet.

N( ) is in the school after school.It is very quiet.
Nobody 没有人
也可以填Noone

Nobody 没有人

None,放学后，学校空无一人，。。。，none指数量上一个也没有