Beijing is one of the biggest cities__China.用of还是in

Beijing is one of the biggest cities__China.用of还是in Beijing is one of the biggest cities in China意思 Beijing is one of the biggest cities in world 改错:Beijing is one of the biggest city in China beijing is one of the biggest cities in the world 同beijing i Beijing is one of the biggest cities in China. 什么意思? 改错Chongqing is one of the biggest city in China. China is one of the biggest country in A___. canada is one of biggest countries in the world. Which star is one of the biggest in solar system? One of the biggest problems in food. Beijing is one of the