Shanghai is the city____the 2010 world Expo is held.A which B where C in where Dthat 选B.为什么?为什么C不对？C为in which对不起我写错了

Shanghai is the largest city in China(同义句)shanghai is _____than____ ____ city in China Shanghai is the biggest city in China.Shanghai is _______ than _____ _____ city in China. shanghai is the biggest city in China.同义句.shanghai is()than()()()the cities in China Shanghai is one of the big city in China . Shanghai is the biggest city in China同意句 shanghai is the biggest city in china 改为同义句 Shanghai is one of the biggest ____（city） Shanghai is the biggest city in China.同义句转换：Shanghai is ____ _____ _____ ______ city in China. Shanghai is an ()city.(attract) it is in the biggest city in ( )this is Shanghai city.it is a beautifful city.it is in the biggest city in ( ) Shanghai is the biggest city in China.(同义句） Shanghai is ___ ___ the ___ ___ in China. Shanghai is the biggest city in our country .(句意不变)__ __city is __ __ Shanghai in our country. Shanghai is the biggest city in our country .(句意不变)___ ___city is ___ ____ Shanghai in our country. Shanghai is the biggest city in our country .(句意不变)__ __city is __ __ Shanghai in our country. Shanghai is a （i ）city in the world.根据首字Shanghai is a （i ）city in the world.根据首字母完成句子 Shanghai is the only one of the big city in China 翻译（which is located in the southern part of the city of Shanghai） 选择Shanghai is one of the biggest ____ in the world.A citiesB cityC a city