解答 答案：be planted． 根据More and more trees and flowers should--（plant） in the park．可知公园里应该种更多的树和花．句子中trees and flowers 和plant应该是被动关系，所以句子用被动语态，这里含有情态动词should，构成是should+be+动词的过去分词．故填be planted．
3．A：Hello，Bob． B：Hello，Jerry．（81）Have you been to City Zoo？ A：Yes，I have．The animals in City Zoo are very interesting． B：Really？By the way，（82）Do you like the zoo？ A：Yes，I do．It's a safe and clean place for animals． B：I see．（83）How often do they feed the animals？ A：Twice a day． B：Twice a day？Why？ A：Because they don't have enough money to buy food for the animals． A：What a pity!What can we do to help them？ B：（84）We can make money by collecting the waste paper． A：And then we can sell the waste paper．It's a good way to make money．And it can also help to protect the environment．As we all know，（85）paper is made from wood． B：Right．This way，we can save both paper and trees．
8．excited，when，meal，he，potato，taste，in，write，go into，be made from Hot pot（火锅） is many Chinese people's favorite food and Liu Yang is one of them． Three days ago，Liu Yang arrived（ 81）in England．There he had three days of hamburgers，sandwiches and（ 82）potatoes．Yesterday he was very（ 83）excited when he heard that there was going to be a （84）meal of hotpot to welcome the new students． He （85）went into the room and sat next to an American girl．To（ 86）his surprise，he saw potatoes and bread in front of him．Where was the hot pot？ （87）When' she saw Liu Yang was very surprised，the American girl told him that hotpot is NOT hot pot．China has hot pot in two words but English hotpot is （88）written in one word． Hotpot（ 89）is made from meat，potatoes and onions．People put it in the oven（烤箱） all day in a pot and on a low heat．It is easy to cook． Hotpot （90）tastes fine．But Liu Yang still misses hot pot，two words!
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