Question

【题目】 It was essential that the application forms ___________ back before the deadline .

A. must be sent B. would be sent

C. be sent D. were sent

Answer 1

【答案】C

【解析】

试题分析：考查虚拟语气。形容词essential和necessary通常和虚拟语气连用，虚拟语气的结构为“should+动词原形”，其中should可以省略。句意：申请表必须在最后期限之前发回来。根据句意可知使用被动语态，C项中省略了should。故C正确。