Peter doesn't wear glasses,so this pair of glasses be his.( )
can't
couldn't
mustn't
After working _____ with each other for months, they felt so _____ to each other that they began to share lunch together.
--What do you think of this book?--It’s _________ than that one.
---How are you getting along with your studies?---I haven’t made ________I should.
He hardly caught the train yesterday afternoon, he? , because he was caught in the rain.
It is believed that traveling to Wuxi in March is enjoyable experience.