单项选择题
Paul Samuelson revolutionized ______ by presenting his students with the most advanced economic thinking at an introductory level.
A．to teach economics
B．teaching that economics is
C．the teaching of economics
D．economics is taught
点击查看答案&解析
<上一题
目录
下一题>
热门
试题
单项选择题
An old woman was badly hurt in _______ the police describe as an apparently motiveless attack.
A．that
B．what
C．whatever
D．which
点击查看答案&解析
单项选择题
Asia _______________ by most experts to be the cradle of human civilization.
A．has been always considered
B．has always been considered
C．always has been considered
D．has been considered always
点击查看答案&解析
相关试题
20（）
19（）
18（）
17（）
16（）