6.They think in getting their materials， and also in _______ them，and in plastering them together with mud.

　　A. arranging B. arrange

　　C. being arranging D. arranged

　　7.I am in favor of his proposal that a special committee _______ to examine the problem.

　　A. set up B. was set up

　　C. be set up D. is setting up

　　8.It has long been assumed _______ aggression is caused by male hormones.

　　A. what B. that

　　C. which D. who

　　9.The actor was almost _______ most audience before he played that part.

　　A. known of B. unknown to

　　C. known for D. unknown for

　　10.The fixed star was _______ a planet.

　　A. made of B. made from

　　C. made up for D. mistaken for

　　参考答案：

　　6.正确答案：A答案解析：介词in后接动名词，所以正确答案为A.

　　7.正确答案：C答案解析：这里所要考查的是虚拟语气的用法，句子中的单词proposal后面的从句做它的同位语，从句中应该使用虚拟语气，形式为“(should)+动词原形”，再者，动词应该用被动语态，所以正确答案为C.

　　8.正确答案：B答案解析：本题考查的是引导词的用法，这里的句子主语是aggression is caused by male hormones，因为主语过长，所以后置，用形式it来替代，后面的引导词就需要用that，所以答案选B.

　　9.正确答案：B答案解析：“这位演员在演这出戏之前几乎大多数观众都不知道他。”“be unknown to ”不知道，陌生。选B. unknown.

　　10.正确答案：D答案解析：be mistaken for：被误认为