问题补充：
Many experts hold the view protection awareness is the key to better environment lies.
A. that; where
B. which; in which
C. which; where
D. that; in which
答案：
(答案→)A. that; where
B. which; in which
C. which; where
D. that; in which
解析：考查名词性从句中的同位语从句和表语从句。句意“许多专家认为更好的环境的关键在于（人们的）环保意识。”view“观点”，that引导同位语从句，对view进行解释说明；is后是一个表语从句，此处指的是抽象的地点，即key“关键”，用where引导表语从句；lie in“在于......”。故选A。
