Directions: Ther e are 20 blanks in the following passage. For each blank there are four choices marked A , B , C and D. You sh ould choose the ONE that bes t fits into the passage. Then mark the corresponding letter on Answer Sheet with a single line through the centre. How old is “old”? The answer has changed 1 the years. Two hundred years ago, you were 2 at 35. That was the 3 life expectancy ( 预期寿命 ) then. At the 4 of this century, as 5 knowledge advanced, the average life span 6 to 45. In 1950, 15 -year-olds were 7 old. Today, a healthy 15 -year-old is looking forward to many more 8 years. So, how old is old? The answer is 9 you’ve heard many times, from 10 people. “You are 11 old (or young) as you feel.” The calendar ( 日历 ) 12 tells you how many years you 13 . Your body tells you how 14 you’ve lived. “Youth,” wrote an anonymous author, “is not a 15 of life — it is a state of mind. Nobody grows old by 16 a number of years; people grow old by deserting ( 抛弃 ) their ideas.” Old is a 17 . Alice Brophy, when she was with the New York City Commission for the Aging, said, “It 18 me when people say, ‘Gee, you look young 19 your age.’ What does that mean? Is there some model 20 you’re supposed to look a certain way at 10 and 20 and 85? You know you can die old at 30 and live young at 80.”