The doctor   the farmer sent his son is well-known in the field. 
#75436
A
by whom
B
at whom
C
to whom
D
for whom
推荐题目
Which sentence is wrong?
#76345
A
The professor lives in the room whose windows face south.
B
Don’t enter the house its roof has been destroyed in the hurricane.(飓风)
C
We prefer the students who like challenging themselves.
D
I still remember the name of the village we visited last year.