[单选题]Directions: In this part there is a sentence with four choices marked A, B, C and D. Choose the one that best completes the sentence.My boss insisted that we ( ) our work before 12 o'clock.

A

finished

B

had finished

C

finish

D

was finishing

正确答案:C
题目解析

当insist表示坚持要求并后接宾语从句时,从句要使用虚拟语气,即从句的谓语动词要使用“should+动词原形”的形式,should可以省略。结合句意可以确定此处应为(should) finish,故选C。
句意:我的老板坚持要我们在12点之前完成我们的工作。

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