问题补充:
单选题Ihavetwogrammars,______areofgreatuse.A.all of whichB.either of whichC.both of thatD.both of which
答案:
D解析主句中的two表明不能选A.从句中的are表明不能选B. both of which用来引导非限制性定语从句.
时间:2020-05-07 13:20:41
单选题Ihavetwogrammars,______areofgreatuse.A.all of whichB.either of whichC.both of thatD.both of which
D解析主句中的two表明不能选A.从句中的are表明不能选B. both of which用来引导非限制性定语从句.