4. Mexico City, ____ has a population of over 10 million, is probably the fastest growing city in the world.
A. which
B. whose
C. that
D. A and B are correct
5. This is Henry, ____ sister works for my father.
A. who
B. whose
C. that
D.All are correct
6. He’s the man ____ people like at first sight.
A. who
B. whom
C. that
D. A & C are correct