one of canada's most popular 为何不加the

one of the world's leading experts用法正确吗? WHAT'S THE JOB OF SB行吗 she showed me one of john's picturd怎么改成双重所有格 she's happy like a bee 为什么不加s I'll join in the teacher's relay rac { } is to the easy of china.it's very small What's the English for this?能不能改成of state of our nation's youth是什么 S( )is one of the world's most popular sports what's upstairs? cat's dance what's conclusions对吗