what's the population of Shanghai 再答: 2 we must take some measures to protect the environment. 再答: 3 great changes have taken place in our homes. 再答: 4右边拍全 再问: 再答: more and. more people get used to keeping in touch with friends by emails. 再答: Tom has been in China for three years 再答: 好了 猜啊 再答: 采啊