If you hadn’t had anything particular to do last Saturday,_____________ (你本该参加我们学校50周年校庆的).

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问题 If you hadn’t had anything particular to do last Saturday,_____________ (你本该参加我们学校50周年校庆的).

选项

答案you should have attended the celebration of the 50th anniversary of our college

解析 此句考查的是表示过去本该做而没有做的事情的表达方法,此时,谓语动词要用should +have+过去分词形式。
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