----Look,Mr.Hu is on the other side of the street. ----It____ be him.He has gone to Lanzhou. 

I was really anxious about you.You ________ home without a word.

---Your sister nearly _______ all her spare time to her study during the three years. ----That's right， or she ________ the first place in her school in the College Entrance Examination. 

There was plenty of time.He       .

With economy increasing steadily, people ______ enjoy a life of higher quality.