It was essential that the application forms______(截至期限前送回)be sent back before th

游客2024-02-14  13

问题 It was essential that the application forms______(截至期限前送回)

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答案 be sent back before the deadline

解析 “截止期限前”可以用before the deadline来表达。“送回”用sendback表达,又由空格前面的“It was essential that”可知后面要用虚拟语气,且forms为动作的承受者,后面的动词要用被动的形式,故答案为(should)be sent back before the deadline。
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