6．-My flight ________.I'd better be on my way.Goodbye.

-Bye.Happy landing!

A．was announced　　 　　　 B．is being announced

C．has announced　　 　　　　 D．is announced

答案与解析：B　flight与动词announce 构成逻辑上的动宾关系，排除C项；由对话语境看用现在进行时表示此刻正在进行的动作，与题意相符。

5．It was not until fish ________ that the villagers realized the importance of protecting the river.

A．died away　　 　　　　　　　 B．died off

C．died from　　　 　　　　　　 D．died out

答案与解析：D　die out“灭绝”符合题意。die away 相当于die down，意为“渐渐消失；停下来”，其主语通常是风、声音等；die off“相继死去”；die from “死于”事故等外因，与题意不符。

4．There's a whole crowd of people over there.Go and see what ________ and if it is good，we will buy it too.

A．is selling　　　 　　　　　　 B．has been selling

C．is being sold　 　　　　　　 D．has been sold

答案与解析：C　用现在进行时表示目前正在进行的动作；what与sell构成逻辑上的动宾关系，故用现在进行时的被动语态。

3．The headmaster has retired but no one knows who will ________ him in the post.

A．follow　 　　　　　　　　　　　 B．succeed

C．remove　　 　　　　　　　　 D．achieve

答案与解析：B　succeed“继承；接任”，符合题意。follow“跟随；紧跟”；remove“免职；罢免”；achieve“取得”。

2．Soon after the terrible earthquake，________ was sent to the people who lost their homes from all over the world.

A．expense　　 　　　　　　　　 B．relief

C．attention　　 　　　　　　　　 D．sympathy

答案与解析：B　relief意为“减轻痛苦的事情”，本题指“救援物品”，符合题意。

1．On seeing her funny­looking hairstyle, her classmates could not ________ their laughs.

A．hold 　　　　　　 B．contain

C．overcome　 　　　　　　　　 D．prevent

答案与解析：B　contain 可意为“容忍”，could not contain their laughs 相当于couldn't help laughing。