下列句中均有一处错误,指出并改正,.超急的,①The weather of xi'an is colder than t

下列句中均有一处错误,指出并改正,.超急的,①The weather of xi'an is colder than that of haikou.②China is larger than any other then Haikou.③She is the tallest in the four girls.④When you learn the piano,you'll find it not difficult if practise a lot.⑤The birthday cake tasted so well that it was eaten up quickly.⑥The more careful you are,the few mistakes you'll make.⑦Which jacket do you prefer better,the red one or the blue one?
⑧ I'm sure you'll have a wonderful time.⑨Greg is taller of the two.