M: Your university seems quite new. How old is it
W: Well, this building was built five years ago, but the school was founded over a century ago, in the early 1900s.

How old was the university at the time of this conversation（）

A. Mr. Black’s secretary.
B. Mr. Suleiman.
C. The educational advisor.
D. A teacher at the University of Chicago.

A. Because whales keep a balance between plants and animals on land.
B. Because whales eat a lot of fish.
C. Because whales eat large amounts of garbage.
D. Because whales keep oceans clean for fish, and people need fish.