If law and order ____not preserved .people will not be able to live a secure life
问题描述：
If law and order ____not preserved .people will not be able to live a secure life
A.are B.were C.is D.was
并选择
答
选C
B与D时态不对.主语是抽象概念,谓语应该用单数(law and order意思为法律秩序,法制)