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。