—Why was Professor Smith unhappy recently? —Because the theory he stuck to ________ wrong. A. proves...
2022-10-10 01:57:40 49次 2016-2017学年广东广州执信中学高一上期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
—Why was Professor Smith unhappy recently?
—Because the theory he stuck to ________ wrong.
A. provesB. was provedC. provedD. proving
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