There had not been such a severe storm in Trumbull, County for a hundred years.

A．Biotechnology can solve all our future energy problems.
B．Biological power is cheaper than nuclear power.
C．Biological power may not be as dangerous as nuclear power,
D．Biological power will keep all its promises.

A．to make something as good as human skin.
B．to produce drugs without side effects.
C．to transplant human organs.
D．to make artificial hearts and eyes.