The biggest one in Fifth Street?此句中Fifth Street为什么要大写?

The Sahara D___ is the biggest one in theThe Sahara D___ is the biggest one in the world. 怎么填? 改错:Beijing is one of the biggest city in China Which star is one of the biggest in solar system? 改错Chongqing is one of the biggest city in China. Maybe one of the biggest problem in China is p______ It's one of the biggest city in China.找错 beijing is one of the biggest cities in the world 同beijing is one of the biggest city 的区别 Mike is now f-----the biggest problem in his life. martin is f( ) the biggest challenge in his work shanghai　is　one　of（　）in　the　worldA　big　city　B　the　biggest　C　biggrst　cicties　D　the　biggest　　cicties tom lives in ( )in the usaA,one of the big city B,the bigger city C,one of the biggest cities D,the biggest cities ) 1.Tokyo is one of _______ in the world.A.the biggest city B.the most biggest city C.the bigg) 1.Tokyo is one of _______ in the world.A.the biggest city B.the most biggest city C.the biggest cities D.the most biggest cities为啥选D Beijing is one of the biggest cities in worldBeijing is one of the biggest cities in the world 不能说成Beijing is the biggest city in the world. One of the biggest sporting enents in the world is the Olympic Games. canada is one of biggest countries in the world.canada is one of biggest countries in the world.找出句中的一处错误． Wuhan is in Hubei p___.It's one of the biggest cities in China. 一道英语句型填空England is one of the biggest island ________ in the world. China is one of the biggest country in the world(找错）