During the Spring Festival, the young a kowtow(磕头) to the elders, but now they only give them best wishes.( )
A.used to giveB.were used to give
C.were used to giving
—I saw Mr. Wang at school just now.--You ____________ make a mistake. He has gone to Shanghai and won’t get back until next Monday.
This book ___ be yours. Look! Here is your name.
– Listen ! Is Professor Johnson giving a report in the hall?– No, it _______ be him. He has gone to America.
You ________ cross the road when the traffic lights are red.
---- go swimming with Dad , Mum? ----No ,you needn’t. You can go bike riding.