4.I'll give you my friend's home address _____I can be reached most evenings.
A.which
B.when
C.whom
D.where
5.No decision ________about my future appointment until all the candidates have been interviewed.
A.will be made
B.is made
C.is being made
D.has been made
6.I have enjoyed my visit here.I'll be very sorry ________
A.for leaving
B.to leave
C.if leaving
D.to have left