A．He thinks flies will take over the earth.
B．He thinks human will die off quite soon.
C．He thinks mass disease could be the next path to extinction.
D．He sees human beings as destructive.

A．Most Americans’ sleeping quality is not as bad as it used to be.
B．Americans do not want to give up any more sleep.
C．Americans guarantee to change the sleeping habits.
D．Americans want to know how bad it is to their health.