Eye doctors recommend that a child’s first eye exam ________ at the age of six months old.
--I am sorry to keep you waiting. I’ll make short work of this. --________ I am not in hurry.
We thought there were 35 students in the dining hall, _____, in fact, there were 40.
She was educated at Beijing University, ___ she went on to have her advanced study abroad.
Sarah, hurry up. I’m afraid you won’t have time to ____ before the party.
What do you think _____ do to protect wildlife?