a large and grand ceremonies
“a”和“+s”不能同時(shí)出現(xiàn),并且ceremony是儀式的意思,用在世博后面恐怕不太妥當(dāng),可以改成exhibition（展會）或者carnival（狂歡）
I can imagine that in Shanghai,has no national boundaries,
此處應(yīng)改成I can imagine that there will be no national boundaries in Shanghai.
people from all over the world are discussing the changes here,not only the environment has become more sanitary,and construction is getting better and better.
應(yīng)改成people from all over the world will discuss the changes here,not only including the more sanitary environment,but also the better and better construction.
My favorite is the mascot of World Expo - Hai Bao.
應(yīng)該說是the mascot of 2010 shanghai expo,因?yàn)楹殐H僅是這一屆世博的吉祥物,而不是所有的世博會
It opens arms to welcome the people from all over the world.
open和arms之間要加個(gè)it
I'm really looking forward to Shanghai World Expo,people of the motherland is also excited because of the Expo Olympics.
應(yīng)該改成I'm really looking forward to Shanghai World Expo,all the Chinese are also excited about it.
沒有EXPO OLYMPICS這種說法
I believe that the Expo would surely be a large success just as the 2008 Olympic Games.
would應(yīng)該改成will,這里不是過去將來時(shí)
large應(yīng)該改成great,large一般指體積上的龐大
just as應(yīng)改成just like,just as是“正當(dāng)……的時(shí)候”的意思
It has become difficult for other countries to replace the state,win glory for the whole of China!
應(yīng)該改成It will make it more difficult for other countries to take the place of China and win the glory.