12. (2018临沂)Now all Chinese couples ________ to have two children.
A. allow  B. allowed  
C. are allowed  D. were allowed
12. C【解析】考查一般现在时的被动语态。句意：现在所有中国夫妻可以被允许有两个孩子。分析句子结构可知，主语“all Chinese couples”与谓语动词之间为动宾关系，故用被动语态；又由时间状语“Now”可知用一般现在时。故选C。