11.( ) –Work hard, _____ you will fall behind others.
A. and B. but C. or D. so
10.( ) London will be the 30th city ______ holds the Olympic Games.
A. where B. that C. which D. what
9.( ) He ______ a piece of waste paper, and put it into the rubbish bag.
A. picked up B. put away C. threw away D. stood up
8.( ) It is said that the big company ______ a new kind of car recently.
A. has developed B. developed C. develops D. had developed
7.( ) He is an unpleasant man. I don’t understand _____ she married him.
A. how B. if C. why D. whether
6.( ) Everyone ______ fight against pollution.
A. may B. should C. mustn’t D. needn’t
5.( ) He knew nothing about it ______ I told him.
A. since B. because C. until D. after
4.( ) –What delicious cake!
–That’s right. It will taste ____ with cream.
A. bad B. well C. worse D. better
3.( ) _____ this kind of pear, and you will like it.
A. To try B. Trying C. Try D. Tried
2.( ) The policeman helped the old man _____ the street.
A. across B. over C. through D. above