问题补充:
单选题Tonyshowedmehisnewcellphone,_______wassmallbutitcouldchangecolorsindifferentweather.A.the screen of whomB.whom the screen ofC.which the screen ofD.the screen of which
答案:
D解析从四个选项的设置不难看出是考察介词加关系代词引导的非限制性定语从句。再从先行词watch可看出是指物,可排除A和B。C项中关系代词应放在介词之后,如改为of which the screen或者whose screen也是可以的。