We once had a poster petition in our fifth grade art class.
“You could win prizes，’’our teacher told US as she wrote the poster information on the blackboard. She passed out sheets of construction paper while continuing，“The first prize is ten dollars. You just have to make sure that the words on the blackboard appear somewhere on your poster. ”
We studied the board critically. Some of US looked with one eye and held up certain colors against the blackboard，rocking the sheets to the fight or left while we conjured up our designs. Others twisted their hair around their fingers or chewed their erasers while deep in thought. We had plans for that ten—dollar grand prize，each and every one of US. I'm going to spend mine on candies，one hopeful would announce，while another practiced looking serious，wise and rich.
Everyone in the class made a poster. Some of us used parts of those fancy paper napkins，while others used nothing but colored construction paper. Some of US used big designs，and some of us preferred to gather our art tidily down in one er of our poster and let the space draw the viewer's attention to it. Some of US would wander past the good students’ desks and then return to our own projects with a growing sense of hopelessness. It was yet another grown-up trick of the soil they seemed especially fond of。making all of US believe we had a fair chance，and then always—always—rewarding the same old winners.
I believe I drew a sailboat，but I can’t say that with any certainty. I made it. I admired it. I determined it to be the very best of all of the posters I had seen，and then I turned it in.
Minutes passed.
No one came along to give me the grand prize，and then someone distracted me，and I probably never would have thought about that poster again.
I was still sitting at my desk，thinking，What poster? When the teacher gave me an envelope with a ten-dollar bill in it and everyone in the class applauded for me.
46. What was the teacher's requirement for the poster?
A. It must appear in time.
B. It must be done in class.
C. It must be done on a construction sheet.
D. It must include the words on the blackboard.
47. The underlined phrase in paragraph 3 most probably means .
A. formed an idea for
B. made an outline for
C. made some space for
D. chose some colors for
48. After the teacher’s words，all the students in the class .
A. 1ooked very serious
B. thought they would be rich
C. began to think about their designs
D. began to play games
49. After seeing the good students’ designs，some students .
A. 1oved their own designs more
B. thought they had a fair chance
C. put their own designs in a er
D. thought they would not win the prize
50. We can infer from the passage that the author .
A. enjoyed grown-up tricks very much
B. 1oved poster petitions very much
C. felt surprised to win the petition
D. became wise and rich after the petition46-50 DACDC
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(答案→)46-50 DACDC
解析：本文作者记叙五年级美术课海报设计比赛的经历。
46.细节理解题。由第二段末句，老师说的话You just have to make sure that the words on the blackboard appear somewhere on your poster可知。
47.词义猜测题。上下句是Some…Other…句式，while we conjured up our designs的对应部分是while deep in thought，可见conjured up的意思是“思考，想象”，故选A。
48.细节理解题。由第三段可知。
49.细节理解题。由第四段倒数第二句Some of us would wander past the good students’ desks and then return to our own projects with a growing sense of hopelessness可知。
50.推理判断题。由always—always—rewarding the same old winners, I can’t say that with any certainty和I probably never…等可推断出，作者对得奖还是惊讶的。