Animalsdomanydifferentamazingthingstogetthroughthewinter.Someofthemmigrate.Theytraveltootherplaceswheretheweatheriswarmerorwheretheycanfindfood.

Manybirdsmigrateinautumn.Becausethetripcanbedangeroussometravelinlargegroups.Forexamplegeese(鹅)flyinnoisy“V”-shapedgroups.Otherkindsofbirdsflyalone.

Someanimalsstayactiveinwinter.Theymustchangethemselvesastheweatherchanges.Manychangetheirdoingortheirbodies.Forexamplesnowshoerabbitsgrowwhitefurtohelpthemhideinthesnow.

Foodishardtofindinwinter.Someanimalslikemicecollectlotsoffoodinautumnandstoreittoeatlater.Someanimalseatdifferentkindsoffoodastheseasonschange.

Someanimalshibernateforpartorallofthewinter.Thisisaspecialverydeepsleep.Theanimal’sbodytemperaturedropsanditsheartbeatandbreathingslowdown.Itusesverylittleenergy.Inautumntheseanimalsgetreadyforwinterbyeatingmuchmorefoodthaninsummerandstoringitasbodyfat.Theyusethisfattokeepthemalivewhilehibernating.

Watermakesgoodprotectionformanyanimals.Whentheweathergetscoldtheymovetothebottomoflakesandrivers.Therefrogsandmanyfishhideunderrocksorfallenleaves.Coldwaterholdsmoreoxygenthanwarmwaterandfrogscanbreathethroughtheirskin.

Everytypeofinsecthasitsownlifecycleandthatisthewayitgrowsandchanges.Differentinsectsspendthewinterindifferentformsoftheirlives.Someinsectsalsospendthewinterwithoutmoving.Someinsectsspendthewinteraspupae（蛹）.Otherinsectsdieafterlayingeggsinautumn.Theeggschangeintonewinsectsinspringandeverythingbeginsalloveragain.

1.Whatdoestheunderlinedword“migrate”inthefirstparagraphmost probablymean?

A.movefromoneplacetoanother B.sleepinthewinter

C.disappear D.lookforfood

2.Whydomanybirdsflyinlargegroups?

A.Theycaneasilyfindfoodthisway. B.Theywilluselittleenergy.

C.Theycangetwarmatnight. D.Theremaybedangerduringthe trip.

3.Themainpurposeoftheexamplesinthelastparagraphistotellus______.

A.mostinsectsdiewhenwintercomes