A.physics
B.recycle
C.bye
D.hydrogen

A. soccer and rugby
B. American football and British football
C. two village ball games
D. two new football games

A. Gene technology can help people to give birth to a baby.
B. Gene technology can be used to clone human babies.
C. How gene technology can be used to treat hereditary diseases.
D. Gene technology can solve all the problems of the English imperial family.