_______ is known to us all is that the theme of Shanghai World Expo is “Better City, Better Life”.

We didn’t know you were in trouble at that time,otherwise we________ you a hand.[ ]

Since our country has so many good table tennis players, we have to ______ the best ones to take part in the game.

4 When Mary finally got there, Tom had left an hour _____

looks sad. Did you tell her about herbrother’s accident— Sorry, I ________ her just before her final exams.