30. The scientists have to 　　　　　the company to provide them with enough money to do the research.

A.hold on 　　　　　　 B.keep on 　 　　　 C.rely on 　　　　　　 D.agree on

29. We can’t reach him not because the line is busy, but because the telephone system has 　　　　.

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

28. Many young people left their hometown for big cities 　　　　　better jobs.

A.in favour of　 　　　 B.in search of 　　 C.in charge of 　　 D.in honour of

27. Why are you so anxious? It isn’t your problem 　　　　　.

A.on purpose　　　　 B.in all 　　　　　　　　 C.on time　　　　　　　　　　 D.after all

26. 　　　　, I don’t like him at all, but it’s strange that he should be so popular among the kids.

A.Fortunately　 　　　 B.Personally　　　　 C.Lonely　　　　　　　　　　 D.Totally