21．Let us suppose that you are in position of parent. Would you allow your child to do such a thing?
A．a；a B．a；the C．the；a D．the；the
22．Most animals have little connection with animals of a different kind , they hunt them for food .
A．if B．while C．unless D．as
23． blood if you can and many lives will be saved.
A．Giving B．Give C．Given D．To give
