问题
选择题
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
答案
答案：D
题目分析： 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。