I ______ for you for two hours, but in vainWhere did you go? —I ______ at my uncle’s

They stopped at Tianjing_____they might visit the TV tower

When Bob woke up he found himself in hospital, but he didn’t know how that _____.

ong you have done to him is terrible,for _____ you should make an apology to him, I think．

_______ leave at the end of this month.— I don’t think you should do that until____ another job.