Security cameras are restricted to ________ spaces,such as hallways and exits.There will be no cameras in classrooms,locker rooms(更衣室)or bathrooms.
A.common
B.private
C.usual
D.ordinary
答案:A
usual意为“通常的,惯例的”,指因重复次数多而常见;ordinary意为“普通的,平常的”,指因“不特别”,“平凡”而常见;common意为“共有的,公共的”,指因众人参与而常见;private意为“私密的”。故common最符合句意。