问题
选择题
A great deal of advanced science and technology has been _______ since China carried out the reform and opening policy.
A．brought down
B．brought in
C．brought out
D．brought up
答案
答案：B
考查短语辨析，bring down 降低， bring in引入，挣得，bring out产生，bring up 培养，句意：自从中国执行党的改革开放以来许多先进的科学技术被引入。所以选B。