The university estimates that living expenses for international students ________ around $8,450 a year,
which ________ a burden for some of them.
| A． | are；is | B． | are；are | C． | is；are | D． | is；is |
The two friends _____ on the Internet for three hours, and they would go on till the next morning.
| A．had been chatting | B．had chatted | C．were chatting | D．has been chatting |
— It is around 100 years, known to us all, ______ the first modern Olympic Games was held.
— It really is. But were _____ ?
| A．that; was that | B．since; was it | C．after; is that | D．when; is it |
Mrs. White became a teacher in 1985. She _____ for twenty years by next summer.
| A．will teach | B．would have taught | C．has been teaching | D．will have been teaching |
— Well, that was really a good meal. I _____ you were a really good cook.
— Thank you.
| A．didn’t know | B．don’t know | C．haven’t known | D．hadn’t known |
Tom’s father had not spoken to him since his marriage, because he considered Tom ______ a mistake in marrying so young a girl.
| A．had made | B．made | C．would make | D．was making |