— Mum, I really think Dad should have a break and get relaxed. — Yes. He _______ too long.

Helen ______ her keys in the office so she had to wait until her husband ______ home. 

 Justin Bieber’s rise to fame is an ________ story which ________ thousands of young actors.

Obviously the only way to make people realize that an action is morally wrong is to punish them if they ________ it.

—Could you meet me at the airport?—I’d like to，but I______Shanghai when you return.