A. suddenly B business C. left D. same E. glad F. sad G. local Mr. Black was young and able. The boss liked him. Last month he was sent to China on 46 . Before he went back from China, he decided to buy something for Tony, the son of his boss. At first he didn' t know what to buy for the boy. 47 he remembered that the boy liked birds very much, so he went to the bird market. He was 48 to find that there were so many kinds of birds there. He bought four beautiful birds, then he told the boy about it on the telephone. As soon as Mr. Black returned to London by air, he went to Tony with the four birds. But on his way to the boss ’s home. one of them flew out of the cage( 笼子 )and there were only three birds 49 in it. Then Mr Black bought a 50 bird to take the place of the missing Chinese one. Tony of course was very happy when he saw the birds. But soon he found one of them was different from the other three. He asked , “It’s a local( 当地的 ) bird , isn’t it , Mr Black?’’ “Yes, it is”Mr black answered,“It’s an interpreter ( 译员 ).”