31．Does_____ matter what you do next?

A．this　　 　　B．it　　 　　　　C．that 　　　　　　D．what

30．Such a chance，once_____，might never come again．

A．1ost　　 　　B．1osing　　 　　C．being lost 　　　D．to be lost

29．She______ geography in a university when I met her，but I have not seen her ever since．

A．has studied　 B．studied　 C．had studied D．was studying

28．The style of Western art has changed many times，____Chinese art has changed less often．

A．when　　 　　B．although　　 　C．while 　　D．as

27．Do you think_____seems to be any need to wait any longer?

A．this　　 　　B．there　　 　　　C．it 　　　D．that

26．--Is your father a famous volcanologist?

--No，but he_____．

A．used to　　 B．used to be　　 C．used 　　D．is used to

25．______the high price，demand for these ears is very high．

A．Because of　　 B．In spite of　 　C．In ease of 　　D．Thanks to

24．This computer doesn’t work properly，because the operating system has____．

A．broken up　　 B．broken down　 　C．broken out D．broken away

23．--May I book two tickets for the football match on August 8?

--Sorry，sir．But we have no tickets______.

A．spare　　 B．useful　 　C．available 　D．suitable

22．Cleaning up litter，such as_____ cigarette butts，greatly improves____ quality of our environment．

A．the：the　　 B．不填；不填　　 C．不填；the 　　D．the；不填