中央型肺癌胸片不易发现的征象是（）。 A.肺不张 B.阻塞性肺炎 C.黏液嵌塞征 D

     Just before Christmas 1978,Kenneth was a passenger in a car as it drove through the Navajo Nation.
The night was dark,and the driver,an elderly woman,   1  and killed an eightyearold boy.
     Later,when he saw how sad the boy's family were,Kenneth made a(n)   2   .He would "do whatever
it takes to make   3   happy at Christmas time"．
     A year later,at the age of 18,he was living with his mother and younger brother.They were hardly
making ends meet on his low wages,but Kenneth bought a used Santa suit and went around    4  people
as poor as himself to give candy and fruit for families even more needy.
     Just before midnight on Christmas Eve,he went knocking on doors of   5   houses in the poorest
section of the Navajo Nation.Many of the darkened homes didn't have   6   .
     Some families were   7    to open their doors so late at night."It's a man! He has a big bag!" He    8  
a boy,holding up a lantern and watching from behind the curtains,tell his parents.Kenneth convinced them
he was   9   .
     At every opened door,he   10    candies,oranges,toys and so on.Many Navajo kids had never seen 
  11   before,so his old costume and storebought beard didn't    12    them.It touched Kenneth that the
kids were excited by so  13    .
     He  14   it up year after year,gathering more "elves (精灵)" to help him.His Christmas Eve  15    have
grown into an annual Navajo feast with gifts of clothing,tools and toys for over 700 people.Kids who
can't make it to the event because they're sick or lack transportation get a personal visit from Kenneth
or one of his elves.
     "My grandfather taught me that you learn to be a man by sharing and by keeping promises," he says.

( )1. A.struck     
( )2.A.conclusion         
( )3.A.the family 
( )4.A.suggesting  
( )5.A.old 
( )6.A.electricity 
( )7.A.happy 
( )8.A.thought  
( )9.A.gentle  
( )10.A.reached for 
( )11.A.Kenneth 
( )12.A.disappoint  
( )13.A.much 
( )14.A.held  
( )15.A.gifts