来自史海山的问题
Little__donetopreventtheairfrombeingpolluted.Much___donetofightagainstpollution.B.hasbeen;havebeenB.have;hasC.hasbeen;hasbeenD.havebeen;havebeenHowtochoose,translateandwhy?Thanks.
Little__donetopreventtheairfrombeingpolluted.Much___donetofightagainstpollution.
B.hasbeen;havebeenB.have;hasC.hasbeen;hasbeenD.havebeen;havebeen
Howtochoose,translateandwhy?Thanks.
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2020-12-24 07:10