选择正确答案，完成短文．Candolphinstalk?Maybetheycan'ttalkwithwordsbuttheytalkwithsounds.Theyshowtheirfeelingswith__1__.Dolphinstravelingroups.Wecallagroupoffisha“__2

　　选择正确答案，完成短文．

　　Candolphinstalk?Maybetheycan'ttalkwithwordsbuttheytalkwithsounds.Theyshowtheirfeelingswith__1__.

　　Dolphinstravelingroups.Wecallagroupoffisha“__2__”.Theydon'tstudybuttheytraveltogether.Dolphinsaremammals（哺乳动物）notfishbuttheyswimtogetherinaschool.Dolphinstalktotheotherdolphinsintheschool.Theygiveinformation.Theytellwhentheyarehappyor__3__orafraid.Theysay“Welcome”whenadolphincomesbacktotheschool.Theymake__4__soundsunderwater.Peoplecan'thearthesesoundsbecausetheyareveryveryhigh.Scientistsmaketapesofthesoundsand__5__them.

　　Sometimespeoplecatchadolphinforlargeaquarium.(Anaquariumisazooforfish.)Peoplecanwatchthedolphinsinashow.Dolphinsdon'tliketobeawayfromtheirschoolinanaquarium.Theyaresadand__6__.Therearemanystoriesaboutdolphins.Theyhelppeople.Sometimestheysavepeople's

　　__7__.Ifyoufallintothewaterandcan'tswimtheymaycomeuptohelpyou.Theyswimfastandjumpvery__8__.Theycanplaywithaball.Theycanstandupandwalkonwater!Theyarefriendly__9__people.Dolphins'meatis__10__butpeopledon'tliketokillthem.Theysaythatdolphinsbringgoodluck.Manypeoplebelievethis.

　　(1)A．signs

　　B．sounds

　　C．words

　　(2)A．group

　　B．team

　　C．school

　　(3)A．glad

　　B．sad

　　C．afraid

　　(4)A．more

　　B．many

　　C．much

　　(5)A．learn

　　B．imitate（模仿）

　　C．study

　　(6)A．alone