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13、 Carbon dioxide, which makes a between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A. difference B. comparison C. connection D. barrier
14、 Happiness and success often come to those are good at recognizing their own strengths.
A. whom B. who C. what D. which
15、 As the world’s population continues to grow, the of food becomes more and more of a concern.
A. worth B. supply C. package D. list
二、完型填空（共1题）
1、 请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。
Michael Greenberg is a very popular New Yorker. He is not famous in sports or the arts. But people in the streets 36 him, especially those who are 37 .
For those people, he is “Gloves” Greenberg. How did he get that 38 ? He looks like any other businessman, wearing a suit and carrying a briefcase(公文箱). But he’s 39 . His briefcase always has some gloves.
In winter, Mr. Greenberg does not 40 like other New Yorkers, who look at the sidewalk and 41 the street. He looks around at 42 . He stops when he 43 someone with no gloves. He gives them a pair and then he
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44 , looking for more people with cold 45 .
On winter days, Mr. Greenberg 46 gloves. During the rest of the year, he 47 gloves. People who have heard about him 48 him gloves, and he has many in his apartment(公寓).
Mr. Greenberg 49 doing this 21 years ago. Now, many poor New Yorkers know him and 50 his behavior(行为). But people who don’t know him are sometimes 51 him. They don’t realize that he just wants to make them 52 .
It runs in the 53 . Michael’s father always helped the poor as he believed it made everyone happier. Michael Greenberg feels