The raw material of the biological sciences has been subjected to ______.

A．It would make leisure activities expensive.
B．It would create much more free time.
C．It would make the workday longer.
D．It would allow people to work on the weekend.

A．They can be got at some of the fast food restaurants.
B．They can be got at most of the fast food restaurants.
C．They can be got at a part of the fast food restaurants.
D．They can be got at all of the fast food restaurants.