Last month a new lawin China to stop people from smoking in public places.A. is passedB. p

问题补充：

Last month a new lawin China to stop people from smoking in public places.

A. is passed

B. passes

C. had passed

D. was passed

答案：

A. is passed

B. passes

C. had passed

(答案→)D. was passed

解析：句意：上个月在中国通过了一部法律，禁止人们在公共场所吸烟。结合语境可知本句描述的是过去发生的动作，故用一般过去时态。主语是动作对象，故用被动语态，选D。