不管......都......"，它们引导的让步状语从句可以互换，如No matter what happened, he would not mind. (＝Whatever happened, he would not mind.)无论发生了什么，他都不会介意的。 但"no matter＋疑问词"结构只能引导让步状语从句，而"疑问词－ever"还可以引导名词性从句。

6．-My car started up at last.

-You should have it repaired________it's working now.

A．as long as B．as though

C．even though D．in case

答案与解析：C　as long as conj."只要"，条件状语从句连词；as though conj."犹如，好像"， 方式状语从句连词；even though conj. "即使；虽然"， 让步状语从句连词；in case conj. "假如；以防"，既可引导条件状语从句又可引导目的状语从句。根据句意可判断答案是C项。

7．The suggestion has been made________the basketball game________put off.

A．for; to B．that; be

C．which; should be D．to; being

答案与解析：B　本题考查虚拟语气在同位语从句和表语从句中的运用。作表示建议、要求、命令等的名词advise、idea、order、demand、plan、proposal、suggestion、request等的表语从句和同位语从句，从句中的谓语动词用(should) ＋ 动词原形。

8．________you call me to say you're not going to the play，I'll see you at the theatre.

A．Once B．As long as

C．Unless D．As soon as

答案与解析：C　句意：如果你不打电话说你不去看戏剧了，那么我们就戏院见。根据句意可判断答案是C项：unless (＝if not)，条件状语从句连词，表示负面的条件， 意为"除非， 如果不"。

9．They found that the cave paintings were________to the research on the development of the Han Dynasty.

A．great important B．of great importance

C．of very importance D．great importance

答案与解析：B　理解句意可知答案是B项：of great importance＝greatly important 。

10．The speaker said that he was feeling highly________one of the guests