31．Due to circumstances 　　　our control the performance has had to be cancelled.

　　　 A．above　　　　　　　 B．within　　　　　　　　 C．beyond　　　　　　 D．over

30．Only those who have experienced hardship 　　　　　well aware of what happiness means.

　　　 A．can they be　　 B．they can be　　 C．can be　　　　　　 D．they can

29．Mary could not have accepted the invitation, 　　　　?

　　　 A．did she　　　　　　 B．was she　　　　　　 C．could she　　　　 D．had she

28．The time is not far away 　　　the information will be made known 　　　　more workers will be trained for their jobs.

　　　 A．until; which　　　 B．when; that　　　 C．before; that　　 D．as; which

27．The Science Museum, 　　　　we visited during a recent trip to Britain, is one of London’s tourist attractions.

　　　 A．which　　　　　　　 B．what　　　　　　　　 C．that　　　　　　　　　 D．where

26．　　　　 was most important to her, she told me, was her family.

　　　 A．It　　　　　　　　　　　 B．This　　　　　　　　　　 C．What 　　　　　　　 D．As

25．--- How about buying Sam a mobile phone? After all, he isn’t a boy any more.

　　 --- I think it necessary, for we sometimes want to make sure if he 　　　　home for dinner.

　　　 A．will come　　　　 B．comes　　　　　　　 C．has come　　　　 D．would come

24．Mother told Jim to watch the milk until it boiled and then 　　　off the gas.

　　　 A．turn　　　　　　　　　 B．turning　　　　　　　 C．turned　　　　　　　 D．having turned

23．--- May I go and play with Dick this afternoon, Mum?

　　 --- No, you can’t go out 　　　　your work is being done.

　　　 A．before　　　　　　　 B．until　　　　　　　　　 C．as　　　　　　　　　　　 D．the moment

22．--- Let’s discuss the question raised last night, shall we?

　　 --- There is no hurry for that. I 　　　　for a conference.

　　　 A．headed　　　　　 B．was heading　　 C．am heading　　 D．have beaded