ulesaboutvisitinghours.C.Theconditionstherearen'tverygood.D.Thenursesanddoctorstheredon'tworkhard.FromthetextweknowthatDagmarismostlikelyA.thestory-teller'ssisterB.Mum'sfriendC.thestory-teller'sclassmateD.Dad'sbossWhichofthefollowingwordsbestdescribesMum?A.strange B.warm-heartedC.clever D.hard-workingB Mostanimalshavelittleconnectionwithanimalsofadifferentkind,unlesstheyhuntthemforfood.Sometimes,however,etogetherinapartnership(伙伴关系)whichdoesgoodtobothofthem.Youmayhavenoticedsomebirdssittingonthebacksofsheep.Thisisnotbecausetheywantaride,butbecausetheyfindeasyfoodintheparasites(寄生虫)onsheep.fort.Soalthoughtheycanmanagewithouteachother,theydobettertogether. Sometimesananimalhasaplantpartner.Therelationshipdevelopsuntilthetwopartnerscannotmanagewithouteachother.Thisissointhecorals(珊瑚)ofthesea.
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