Herearesomepiecesofinformationfromanencyclo?paedia.Protozoa

Protozoaarethesmallestanimals.Wecan'tseethembuttheydoalotforus.Protozoaareusefulforfishandotheranimals.Someproto/oaaregoodforhumanbeingsbyeatingdangerousbacteria(细菌).Butsomeparasitesmakehumanbeingsill.

Fish

Thereareover20000differentkindsoffish.Someofthemareverysmallbutsomearebig.Forexamplethewhalesharkisover60feetlong.Mostfishbreathethroughgills.Gillsmakethemgetoxygeninwater.Mostfishusefinsandtailsforswimming.

Amphibians

Amphibianshaveeggsinwaterandyoungamphibiansarelikesmallfish.Thetadpolelivesinwaterhhasatailandgills.Soitcanbreatheunderwater.Whenitbecomesafrogitdoesn'thavethegillsorthetailbutthenithaslegsforwalkingonland.Mostam?phibianscanbothwalkonlandandswiminwater.

36. Thispassageisabout_•

A.humanbeingsB.|)lan(sC.animals D.water

37. Whichofthefollowingisafish?

A.Aparasite. B.Awhaleshark.

C.Atadpole. D.Afrog.

38. canbothwalkonlandandswiminwater.A.Allamphibians B.FewamphibiansC.Notallamphibians D.Everyamphibian

39. Whatdoestheunderlinedword"gills"meaninChinese?A.尾巴B.心脏 C.肝 D.鳃

40. WhichofthefollowingisNOTTRUE?

A. Youngamphibiansarefish.

B. Fishusefinsandtailsforswimming.

C. Fishandlittleamphibianshavegills.

D. Wecan'tseeprotozoabecausetheyaresmall.