24. (A)The low efficiency of their operation. 　　(B) Competition from other modes of transport. 　　(C) Constant complaints from passengers. 　　(D)The passing of the new transport act.

30. Questions 30 to 32 are based on the passage you have just heard. 　　(A)Whether we can develop social ties on the Internet. 　　(B) Whether a deleted photo is immediately removed from the web. 　　(C) Whether our blogs can be renewed daily. 　　(D)Whether we can set up our own websites.