Great changes ______ in China in the past 20 years.
| A．took place | B．have taken place | C．were taken place | D．have been taken place |
Scientists are convinced ________the positive effect of laughter________ physical and mental health.
| A．of; at | B．of; on | C．by; in | D．on; at |
---- Would she mind playing against her former teammates?
----______She is willing to play against any tough players.
| A．I think so. | B．I’m not surprised | C．Of course | D．Not likely! |
Look out! Don’t get close to the house________the roof is under repair.
| A．whose | B．of which | C．which | D．what |
--- Jack, you seem in high spirits.
--- __________ We won the match 4-0.
| A．Guess what? | B．So what? | C．No wonder. | D．No doubt |
He is famous both_________a novelist and poet but he is more famous_________ his novels.
| A．for; as | B．with; for | C．as; for | D．like; as |