When will the new driving laws come into?A. useB. effectC. serviceD. existence

问题补充：

When will the new driving laws come into?

A. use

B. effect

C. service

D. existence

答案：

A. use

(答案→)B. effect

C. service

D. existence

解析： effect come into effect“开始生效”；come into use“开始使用”；come into service“投入服务/使用”；come into existence“存在”。