完形填空。 A rich man was once riding along the road and saw an old man digging in his garden. On the ground lay a(n) 1 tree, ready to be planted. The rich man called out to the old man, 'What kind of 2 are you planting there, my good man?' 'This is a fig (无花果) tree, sir.' He said.    'A fig tree?' the rich man was very surprised, 'Why, 3 are you, may I ask?' 'I am ninety years old.'    'What!' cried the rich man, 'You are ninety years old. You are planting a very young tree now and it'll 4 years to give fruit. You certainly don't hope 5 long enough to get any fruit from this tree.' The old man looked around the garden. Then he said 6 a smile, 'Tell me, sir. Did you eat figs 7 you were a boy?' 'Sure,' the man did not know why he asked this question.  'Then tell me this,' he said, 'Who 8 the fig trees?'    'Why-why? I don't know.' 'You see, sir.' the old man 9 , 'Our forefathers (祖先) planted trees for us to enjoy 10 I am doing the same for the people after men.' (     )1. A. tall (     )2. A. tree (     )3. A. who (     )4. A. pay (     )5. A. live (     )6. A. on (     )7. A. when (     )8. A. plants (     )9. A. shouted at (     )10. A. but B. young B. flower B. how old B. spend B. living B. with B. before B. is planting B. called for B. and C. old C. vegetable C. where C. take C. to live C. for C. because C. planted C. went on C. so