填空题 It is essential that the application forms (send) 1as early as possible.
【正确答案】
【答案解析】(should)be sent) [测试重点] 虚拟语气
[试题精解] It is essential that...结果常用虚拟语气，其谓语动词的形式为should do， should通常可以省略。根据句子要求，谓语动词要用被动语态。