About 80% of what you see floating in a ray of sunshine is ______.

A．People shed more than any other animal indoors.
B．People do not keep their room tidy.
C．People’s skin flakes are small enough to float in the air and pollute the indoor air.
D．The furniture people buy is in bad quality.

A．more Israeli troops were sent to combat the Arab militants
B．Israel closed both the Gaza Strip and West Bank
C．thousands of Arab Workers lost their jobs
D．many Palestinians were driven out of their homeland