问题
选择题
The most important thing ______ we should consider is the first idea _____ he has mentioned in the speech.
A．which; that
B．that; which
C．which; which
D．that; that
答案
答案：D
考查定语从句。第一个that在定语从句中作consider的宾语；第二个that在定语从句中作mention的宾语，由于先行词分别为最高级及序数词修饰，关系词用that。