根据句意及汉语提示完成下列句子。 1.Dalian is ________ (比……小) Shanghai. 2.Changjiang is ________ (比……宽)the River Thames. 3.Shanghai is _________ (比……忙)Hong Kong. 4.China is ________ (比……大)the UK. 5.It’s a city ________ (在……的南部)America. 6.New York is ________ (繁忙的城市).