问题: 英译汉，谢谢！
Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. You should choose the one that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the center.
irections: There is one error in each line of the passage. Proofread the passage and choose the errors. Then mark the corresponding letter on the Answer Sheet with a single line through the center.
谢谢！
解答:
译文如下：
要求：下面的段落有20个空白处，每个空白处，都有四个备选答案：A、B、C、D，从这四个备选答案中选出一个最佳答案，然后在答题卡上用笔在相应的备选答案上涂上。
要求：下面的文章中每行都有一处错误，找出并改正错误，然后用笔在相应的备选答案上涂上.
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