A

　　Ever since her husband went to work abroad, Mrs. Jackson has lived on her own in their big old suburban house, which was purchased by her husband about 20 years ago.

　　Considering her safety, her son has been trying hard to ask her to sell the house and buy a new and small one in downtown. To his disappointment, Mrs. Jackson doesn’t accept the idea. She says that she has to look after their old house, as the family tie. But recently there are often stories about someone stealing things around here.

　　It was a freezing day before Christmas Eve. At about four o’clock in the afternoon, Mrs. Jackson was enjoying some Christmas music when someone knocked at the door. She heard it but didn’t move. Another knock. Who might it be？ Mrs. Jackson was a little afraid. She determined not to answer the door but keep waiting. Then nothing strange happened and no more knocks. She waited a few minutes. She walked quietly to the door, and listened. She heard nothing but the wind outside. She slowly unfastened the door and looked outside through the crack. She then let out a cry and threw the door wide open! She could hardly believe her eyes. At the door she saw a tall, beautiful Christmas tree! In the tree was a Christmas card with the following words:

　　Merry Christmas!

Your new neighbor

21．It is because he thinks about _______ that her son wants her to change a place to live in.

A．her health 　　　　　　B．her safety

C．her mood 　　　　　　　D．her character

22．The reason why Mrs. Jackson wants to keep the house is that _______.

A．it is comfortable

B．she can live alone

C．it is the family connection

D．its value can be higher

23．When Mrs. Jackson “threw the door wide open”, she felt _______.

A．frightened 　　　　　B．surprised

C．funny 　　　　　　　 D．easy