问题
选择题
Mencius believed that the reason man is different from animals is
man is good.
A．that; that
B．why; because
C．why; that
D．which; that
答案
答案：C
考查定语从句和表语从句。the reason是先行词，在定从 man is different from animals中作原因状语，用why引导； man is good是表语从句，且句子不缺成分，要用that引导。所以选C。