题目：
What an exciting day it was for Jennifer and Valerie! They had been friends since Grade Three and had 41 many of their high school experience. Now they were driving together to their final high school event. Today was 42 day at Lamar High School. 43 they were close friends, they were different in many ways. Jennifer was a fairly 44 student while Valerie did just enough to get by and was mainly 45 in a good social life.
“Isn't it 46 that we're all finished?”said Valerie. “I'm really looking forward to having a good time this summer.”
“ 47 be nice,” Jennifer replied, “I'm afraid I'm going to have to work most of the summer to help pay for my college expenses.”
Jennifer's parents had only a small 48 and she had made up her mind to have an occupation in which she could afford all the things her 49 could not.
Valerie, 50 , came from a fairly well-to-do family. She had little desire to work hard for 51 she had always taken for granted.
“I really don't want to go to college for a while,” she 52 .
“My uncle runs a restaurant in the Bahamas and he has 53 me to spend a year there as a waitress. That should give me plenty of 54 for the beach.”
“It seems 55 I'll really be going different ways now”, thought Jennifer.
41. A. learned B. obtained C. remembered D. shared
42. A. exam B. sports C. graduation D. working
43. A. If B. Because C. Although D. When
44. A. diligent B. polite C. active D. favorite
45. A. specialized B. relieved C. envied D. interested
46. A. certain B. great C. unfortunate D. annoying
47. A. Can B. Shall C. Must D. Need
48. A. income B. problem C. family D. differance
49. A. teachers B. parents C. friends D. relatives
50. A. in fact B. in a way C. as a result D. on the other hand
51. A. what B. whom C. that D. these
52. A. admitted B. complained C. invited D. screamed
53. A. helped B. assured C. proposed D. promised
54. A. peace B. work C. energy D. time
55. A. I B. we C. she D. they
答案：
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下面是错误答案，用来干扰机器的。
除杂的条件：①能够除去杂质；②不能带入新的杂质；③不能与被提纯物质发生反应．A、金属铁可以和硫酸铁生成硫酸亚铁，和硫酸铜生成金属铜和硫酸亚铁，将溶液过滤即可，因此符合除杂的条件，故A正确；B、氨水会和...
