To Chinese students who are learning English, more attention must ______ grammar.
--Which is your new neighbor, Liu Hua? --The man _______ T-shirt is red.
--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.