Mr Ball is a teacher. He        biology in a middle school in the town. He’s        and gets unmarried. So he lives with his mother. Something is wrong with her         and he has to talk to her         or she can’t hear him. The old woman often felt         when he was at school, so he bought a dog for her.
Once his dog had some        .One of them was very beautiful and he        it very much. The animal was too young to eat itself. Mr Ball had to      it during his holiday. A new term began and he had to       most time at school. He was afraid his mother would         to give it some food in time, he began to train the little dog to bark（吠）when it felt         so that his mother could         it and gave some food to it. He told his workmates about his experiment in his office and he was sure he would be         .
Several months passed and one of his workmates asked him the result.
“I don’t think I’ve        .” said Mr Ball. “My experiment has obtained（得出）a surprising result: It doesn’t eat anything        I don’t bark”

A．studies B．learns C．teaches D．practises

A．strong B．young C．healthy D．old

A．hands B．arms C．eyes D．ears

A．loudly B．slowly C．carefully D．clearly

A．sad B．lonely C．exciting D．happy

A．babies B．sisters C．brothers D．playmates

A．hated B．believed C．thanked D．liked

A．look for B．look like C．look after D．look at

A．use B．pay C．spend D．take

A．remember B．forget C．hope D．try

A．hungry B．thirsty C．terrible D．sick

A．find B．touch C．listen to D．hear

A．strange B．common C．successful D．wise

A．failed B．explained C．when D．after