（ ）23.The number of various environmental programs，_____important role have been realized by more and more people，has a rapid growth these years.

A.Whose

B.wher

C.which

D.that

23.A【解析】分析句子结构可知，空格处为非限定性定语从句，先行词与空后的important role为所有关系，故连接词用whose。句意：近年来，各种环境项目的数量快速增长，越来越多的人意识到它的重要地位。

（ ）24.As I opened my eyes，in_____direction I looked，I could see smiling，peaceful，calm and content faces.

A.Whatever

B.however

C.whichever

D.wherver

24.C【解析】whatever“无论什么”；however“然而，但是”；whichever“无论哪一个”；wherver“无论哪里”。句意：当我睁开眼睛时，无论我往哪个方向看，都能看到微笑、安宁、平静和满足的脸庞。in为介词，后面只能跟名词性成分，故排除B、D。根据“无论我往哪个方向看”可知whichever正确。