Mrs.Wong lived alone. She was a very old lady and could not walk far. She could not leave her flat. She could not do her shopping or do much housework. She did not have much money and could not pay someone to help her.

flat:公寓

housework:家务

    Tony and Jenny knew this. Every day after school they visited Mrs.Wong. They helped her to water the plants. Sometimes they helped her to sweep the floor. Sometimes they helped her to wash the dishes. Sometimes they went to the shops and bought food for her. Jenny always made a cup of tea for Mrs.Wong.

visit:拜访

sweep:清扫

    Their favourite job was looking after her pet dog. Tony and Jenny often brought bones and other tasty food for the dog. They also liked to take the dog for walks and play with it.

    One day they knocked on the door. “It’s us, Mrs.Wong.” they called. There was no answer. “Mrs.Wong! Are you there?” Jenny called. There was still no answer. “Something’s wrong,” Tony said. 
    Was Tony right? What do you think happened next?

knock:敲

happen:发生