16. Do you know the driver………………took them to town last night.?
​a. which​b. whom​c. where​d. who
17. Anybody…………..is tired may leave.
​a. whom​b. who​c. where​d. which.
18. He talked about the books and the authors………….interested him.
​a. which​b. who​c. that​d. when
19. This is the book of …………….I was speaking.
​a. which​b. whom​c. that​d. where
20. The cat …………tail is long does not belong to me.
​a. whom​b. that​c. which​d. whose.