My teacher used to (courage)______us to answer his questions voluntarily.

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问题 My teacher used to (courage)______us to answer his questions voluntarily.

选项

答案encourage

解析 此处考查固定短语used to do sth.,表示“过去常常做某事”。所以空格处填入动词原形。courage是名词,动词形式为encourage。注意区别另外一个类似的固定短语be used to doing sth.,意为“习惯做某事”。
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