Have you been to the Great Wall?－Perhaps not in my memory. _______ , it might have been during my early childhood.

How do you know so many English words?- _____ reading all kinds of English books , like magazines and newspapers.[ ]

Who are you going to play _______? [ ]

How many teachers are there in your school?—About two _________.

Our school is so famous that _______ people come and visit it every term.