This is the most important respect _____ civilized man can be distinguished from primitive communities.
A.in that
B.which
C.where
D.in which
選D.in which
這里是定語從句,且要用介詞in,
構(gòu)成in respect尊重.
原句翻譯：
區(qū)分原始人和現(xiàn)代人的最重要的是尊重.