Question

do you know the boy __ is talking with jim?yes,he is tom,a new student in our class.

A.who Bwhom Cwhat Dwhich

Answer 1

B，这个是定语从句，因为主语是人the boy，所以用WHO指代，而不用which，而he不能引导定语从句，whom是宾格，当定语从句的从句中缺少的是宾语成分，采用whom作为引导词。而这句从句里面显然缺的是主语。所以选b

Answer 2

选A do you know the boy who is talking with jim?yes,he is tom,a new student in our class.