题目内容：
回答题：Thepassage contains TEN errors. Each indicated line contains a maximum of ONEerror. In each case, only ONE word is involveD．You should proofread thepassage and Correct it in the following way:
For a wrong word, underline the wrong wordand write the correct one in the blank provided at the end of the line.
For a missing word, mark the position of themissing word with a "∧" sign and write the word you believe to bemissing in the blank provided at the end of the line.
For an unnecessary word, cross the unnecessary word witha slash "/" and put the word in the blank provided at the end of the line.
41.__________
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