一，单项择。
1.— Lo ok! The mother elephant is___the baby elephant.—Yeah,they look very happy.
A. watering B. waters C.water D.to water
2.There are many bikes. ____oldest one is Jack’s.
A. An. B.The C.A D./
3.Excuse me. May I use your ruler? – Sorry, I’m _______it now.
A.washing B. looking C.using D.playing
