改错题。句子中有一处是有错误的，把它找出来并改正。
①There are many people are playing basketball there.____
②Could you tell me the different between the two books.____
③It was my grandpa's eighty birthday yesterday._____
④Bady,it's very lazy for you to sleep late every morning.____
⑤I wrote an 800-word's composition yesterday.____
⑥The fish we caught is still living.____
⑦The Great Wall is one of the most famous building all over the world.____
⑧If Tom will study hard this term,he will catch up with his classmates.____
