【题目】It was the culture, rather than the language, ___________ made it hard for him to adapt to the new environment abroad.
A.where
B.why
C.what
D.that

【答案】D
【解析】考查强调句型。句意：是文化，而不是语言，使得他很难适应国外的新的环境。这是一个强调句，强调句的基本结构是it is / was + 被强调部分 + that + 句子的其他成分，所以用that，所以选D。