A. arranging B. arrange
C. being arranging D. arranged
2.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
3.It has long been assumed _______ aggression is caused by male hormones.
A. what B. that
C. which D. who
4.The actor was almost _______ most audience before he played that part.
A. known of B. unknown to
C. known for D. unknown for
5.The fixed star was _______ a planet.
A. made of B. made from
C. made up for D. mistaken for
3.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.
4.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.
5.正确答案：D答案解析：be mistaken for：被误认为