问题
选择题
President Xi Jinping demanded that the environmental problems ______ paid special attention to.
A．referred to being
B．referred to be
C．refer to being
D．refer to be
答案
答案：B
题目分析:考查非谓语动词。由语义可知refer to 和problem之间是被动关系，所以用过去分词做后置定语，而demand后面宾语从句的谓语动词应该用should +动词原形，所以答案选B。句意：习 * * * * 要求提到的环保问题应该给予特别关注。