题目内容
[2002上海] Perseverance is a kind of quality—and that's ________ it takes to do anything well.
A. what B. that C. which D. why
答案：A
解析：
解析：
句子缺主语，用what
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26.[2002上海] Since you have repaired my TV set, ________ is no need for me to buy a new one.
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