In addition to the (require) ______ courses, there are still some other courses

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问题 In addition to the (require) ______ courses, there are still some other courses to be individually chosen.

选项

答案 required

解析 本题考查动词和形容词的转化。空格处前的冠词和其后的名词表明空格处应为形容词。require是动词,可通过在其后加上-ed,变为适合本题要求的形容词required。
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