A. Simple names of hurricanes always have simple meanings.
B. To give a hurricane a name requires a long and difficult process.
C. Naming a hurricane is not so easy as the name itself seems.
D. Hurricanes have simple names for people to memorize them.

A. Other living things change their environment while man doesn’ t.
B. Man alters his environment while he is adapted to it, but other living things do not.
C. Other living things is not only adapted to their environment but also alters it.
D. Man is only adapted to the environment but he doesn’ t alter it.