四、阅读理解(共15小题;每题2分，共30分。)
阅读下列短文，然后根据短文的内容从每小题的四个选择项中选出最佳的一项，并把它前面的大写字母填入左边的括号里。
A
Jimmy was five years old and his brother，Billy，was only a baby. One morning his mother waited for an important telephone call for hours，but nobody called. There was no bread in the house and she had to go out to buy some. Jimmy stayed at home to look after the baby. When the mother was out，the telephone rang and Jimmy answered.
Mr. Baker：Hello!May I speak to Mrs. White?
Jimmy：Sorry，Mother is out.
Mr. Baker：Well，when she comes back，say to her，“Mr. Baker called.”
Jimmy：What?
Mr. Baker：Mr. Baker. Write it down. B-A-K-E-R.
Jimmy：How do you write B?
Mr. Baker：How do I write…?Listen，little boy，is there anybody else with you?Any brothers or sisters?
Jimmy：Yes，my brother Billy is here.
Mr. Baker：Good. I want to talk to him，please.
Jimmy：All right. Jimmy took the telephone to the baby‘s bed and put it beside its head. Not long after that his mother came back.
Mother：Did anybody call?
Jimmy：Yes，a man called. But he only wanted to talk to Billy.
( )51. Jimmy‘s mother waited for ________.
A. an important man
B. a good friend
C. a telephone call
D. a piece of good news
( )52. Jimmy‘s mother went out because ________.
A. she waited for hours
B. nobody called
C. she had to buy some bread
D. she had to buy some milk
( )53. Jimmy couldn‘t write down Mr. Baker’s name because ________.
A. he had no pen or paper
B. he couldn‘t read or write
C. he had to look after the baby
D. he had to play with his brother
( )54. Mr. Baker wanted to talk to ________.
A. a child older than Jimmy
B. a child younger than Jimmy
C. Jimmy‘s brother Billy
D. Jimmy‘s sister Betty
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