30、Charles Babbage is generally considered______ the first computer

A．inventing　　 B．to invent　　 C．to have invented　　 D．having invented

29、She will make little progress in her study ______ she has little knowledge of language.

A．unless　　 B．although　　 C．since　　 D．even if

28、Not until the early years of the 19^th century ______ what heat is.

A．didn’t man know　 B．did man know　 C．man did know　 D．man knew

27、The premier is always busy with state______.

A．matter　　 B．things　　 C．affairs　　 D．business

26、In 1963 King made a speech to thousands of people, ______ immediately made him become world-famous.

A．that　　 B．who　　 C．which　　 D．when

25、In 1998 Zhu Rongji was elected ______of the Chinese government.

A．a Premier　　 B．an Premier　　 C．the Premier　　 D．Premier

24、Frank is the kind of person whom people like to ______.

A．Make friend with　　 B．make friend of　　

C．make friend　　 D．make friends with

23、______, we’ll go to swim.

A．Time permits　 B．If time permit　 C．Time permitting　 D．Time permited

22、During the break he began to sing a song and we all ______.

A．took part in　　 B．join in　　 C．joined　　 D．together

21、Lei Feng ______ us a good example and we should ______ it.

A．follow; set　　 B．gave; learn from　　 C．sets; follow　　 D．set; follow