The most important thing_____we should pay attention to is the first thing _____I have said.
A. which; that
B. that; which
C. which; which
D. that; that
The most important thing_____we should pay attention to is the first thing _____I have said.
A. which; that
B. that; which
C. which; which
D. that; that
D
先行词分别被形容词最高级和序数词修饰，故关系代词都选that。