It’s necessary for human beings to breath _______ and plants can produce it.
--Do you know _______ No. 1 Middle School?--Next Friday.
Granny often tells us not _______ others in our daily life.
-- Look ! Mr. Zhang is over there.-- That _______ be him. He has already gone to Taian.
Hurry up! Once the concert starts, _______ is allowed to enter the concert hall.
-- I hear your grandpa has an old cup in your home.-- Yes. It ________ drinking tea long ago and my grandpa _______ drink tea with it when he was young.