According to China's Food Safety Law, in February 2009, the State Council established the Food Safety Committee to oversee a chain of departments.
A. as is passed
B. as it was passed
C. which is passed
D. which was passed
网友回答
A. as is passed
B. as it was passed
C. which is passed
(答案→)D. which was passed
解析： which is passed in February是定语从句，用来修饰China’s Food Safety Law, B中应把it去掉。