高考英语.WeknowthattheBlackSea,onethousandyearsago,wasafreshwaterlakeabout_______
.WeknowthattheBlackSea,onethousandyearsago,wasafreshwaterlakeabout_______andunconnectedwiththeMediterranean.
A.itstwothirdspresentsizeB.two-thirdssizeofthepresent
C.itstwo-thirdsofthepresentsizeD.two-thirdsitspresentsize
请问答案是什么,为什么不能选别的,能不能跟我详细的讲一下表示倍数的?
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