题目内容：

根据短文内容，从短文后的选项中选出能够填入空白处的最佳选项，

选项有两个为多余项。

In China some radio broadcasting station use hotline to encourage the listeners to take part in the talk shows.

__71__Yes,the fact is some people do nothing but break the whole programme

.__72__Sometimes they do not even know what the host is talking about. So the host has to tell the caller what the show is about. Usually the caller will ask questions which express his hope and show his ignorance. The host has to answer and explain ---how silly this is.! __73 ___

It seems that some people phone the hotlines in fun. __74__ They don’t care what the topic is, whether they themselves are interested in the topic or how silly they appear to be.

__75___ In my opinion, if a caller does not know what is going on ,the operator should not let the caller take part in it.

A．Radio broadcasting stations use hotlines in a wrong way

B．That is a good idea

C．It waste a lot of time

D．Some people do not know what the show is about

E.       Some people know little about the topic under discussion

F.       They just want to let the listeners hear them

G.      It is necessary for radio broadcasting to improve the hotline programmes