He focused his effort ____the house ___sale for fear that the prices of them would go up suddenly. ...
2022-12-27 22:18:21 76次 2014届云南省高二上学期期中考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He focused his effort ____the house
___sale for fear that the prices of them would go up suddenly.
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A．on; for
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B．on; in
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C．to; for
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D．to; in
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