来自刘升贵的问题
【myparentsboughtmetensofbooksformybirthday,___90%dealwithwesternandeasternhistoryA.aboutwhichB.ofwhichC.forwhichD.inwhich】
myparentsboughtmetensofbooksformybirthday,___90%dealwithwesternandeasternhistory
A.aboutwhichB.ofwhichC.forwhichD.inwhich

