训练1(时间:45分钟)Ⅰ
介副词填空1.Withannualrainfallclose__________zero,Antarcticaistechnicallyadesert
2.Antarcticaholds90%oftheworld'sice,andmostofitsfreshwateris________afrozenstate
3.________averageitistwokilometersthick
4.YetAntarcticaisfullofwildlife,whichhasadapted________itsextremeconditions
5.Therestoftheplantsaremadeup________mosses,algaeandlichen
6.Gasesandminerals,________theformofvolcanicdusttrappedintheice,cantellusalotofaboutwhattheworld'sclimatewaslikeinpastages
7.Onerock,known________the“Alien”rock,maycontainevidenceofextra-terrestriallife
8.ANorwegiancalledCarstensBorchgrevinkbecamethefirstmantosetfoot________theAntarcticmainland
9.________particular,itaimstokeepAntarcticafreefromnucleartestsandradioactivewaste
10.Todayscientists________manycountriestraveltoAntarcticatostudyi