1.he has to work on Sundays,( ) he does not like.

1.he has to work on Sundays,( ) he does not like.
A.and which
B.which
C.and when.D.when
2.China has hundreds of islands,(.) we all know.
A.in which.B.at which.C.of which.D.which
3.people think highly of patients(.) he serves the customers.
A.of which.B.with which
C.that.D.by which
4.he has not reached the age(.)he can marry.
A.that.B.at which C.by which D.on which.
5.do you know the man(.)just now?
A.to who I nodded
B.I nodded to
C.whom I nodded
D.