Both his parents look sad . Maybe they __what's happened to him .
—You should ________ your son. He works harder than before. —Thanks, I will.
---I have enjoyed the party so much, but I have to go home now, it’s too late. --- _______________
The room is ___________ for eight people to live in.
Though the player is over forty, he can run ___________ some younger players.
Don’t ___________ your dictionary all the time when you meet new words.