20．The roles the women are　　　　 in society are greater and greater．

A．taking　　 B．working　　 C．reaching　　 D．playing

19．-What do you think made John so unhappy all those days?

　-　　　　 the entrance examination．

A．Because he failed　 B．That he failed　　 C．She failed　 D．Because of failing

18．　　　 your composition carefully，some common mistakes can he avoided．

A．Having checked　 B．Check　　 C．If you check　　 D．Checking

17．　　 student you are，you can't work out the problem in such a short time．

A．Whatever clever　 B．However clever C．However clever a D．Whatever clever a

16．The picture of my lovely son　　　 memories of my childhood．

A．called up　　 B．turned up　　 C．called on　 　　　D．reminded

15．I would have told you the news，but I 　　　too busy．

A．had been　　 B．were　　 　　C．have been　 　　D．was

14．I'm trying to be the kind of teacher that the students will　　　　 ．

A．look up to　　 B．live up to　　 C．watch out for　　 D．put up with