（1）She had three sons,all____became doctors.A of which B whi

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（1）She had three sons,all____became doctors.A of which B which C who D of whom (2) The pencil__
（1）She had three sons,all____became doctors.
A of which B which C who D of whom
(2) The pencil___I wrote is gone.
A that B by which C with it D with which

D
定语从句,先行词是人,关系代词用who或whom,但是因为要做介词of的宾语,只能用whom
D
定语从句,先行词是物,关系代词用that 或which,但是此处只用which,因为“用笔写”write with a pen ,介词with提前位于关系代词之前,只能用which

（1）She had three sons,all____became doctors.A of which B whi She had three sons,all___became doctors. She had three sons,all of whom became doctors.这里面的连词为什么用whom She had two sons,__________became doctors Mr Brown has three sons,two of them are doctors,______is a p She had two sons,______ became teachers.A,both of them B bot Tom has two brothers,both of ______ are doctors.A.them B.whi he has two sons,( )work as doctors.Aboth of which Bboth of w We have three sons but _____them live nearby.A.either of B.a Have you seen the book _is yellow?A.the cover of which B whi She has 2 sons,both of whom are doctors.请问这句话怎么翻译? 定语从句a)he has three sisters,none of _____is a doctors.b)he ha