When Madam Curie did the experiment again, she was more careful where she a mistake. A．madeB．has madeC．was makingD．had made 题目和参考答案——青夏教育精英家教网—

题目内容

15. When Madam Curie did the experiment again, she was more careful where she _____ a mistake.

A．made

B．has made

C．was making

D．had made

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