阅读文章，根据文章内容回答问题。
Candolphinstalk?Maybetheycan’ttalkwithwords,buttheytalkwithsounds．
Dolphinstravelinagroup．Wecallagroupoffisha“school”．Theydon’tstudybuttheytraveltogether．Dolphinsaremammals,notfish,buttheyswimtogetherinaschool．
Dolphinstalktootherdolphinsintheschool．Theygiveinformation．Theytellwhentheyarehappyorsadorafraid．Theysaywelcomewhenadolphincomesbacktotheschool．Theytalkwhentheyplay．
Theymakeafewsoundsabovewater．Theymakemanymoresoundsunderwater．Peoplecan’thearthesesoundsbecausetheyareveryhigh．Scientistsmaketapesofthesoundsandstudythem．
Sometimespeoplecatchadolphinforalargeaquarium．Peoplewatchthedolphinsinashow．Dolphinsdon’tliketobeawayfromtheirschool．Intheaquariumtheyaresadandlonely．Therearemanystoriesaboutdolphins．Theycanhelppeople．Sometimestheysavesomebody’slife．Dolphinmeatisgoodbutpeopledon’tliketokillthem．Theysaythatdolphinsbringgoodluck．Manypeoplebelievethis．
1．Howcandolphinstalk?
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2．Whatdowecallagroupoffish?
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3．Aredolphinsfish?
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4．Inwhichplacecandolphinsmakemanymoresounds?
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5．Whatdomanypeoplebelieve?
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