It's high time that you even harder at your lessons as the exam is around the corner.A. w

问题补充：

Its high time that you even harder at your lessons as the exam is around the corner.

A. work

B. will work

C. worked

D. have to work

答案：

A. work

B. will work

(答案→)C. worked

D. have to work

解析：考查虚拟语气：Its time that从句谓语通常用过去式表示现在或将来，或“should+动词原形”(较少见，且should不能省略)，其意为“(早)该干某事了”。 time前有时有about和high修饰：句意：因为考试就要到了，正是你努力学习的时候了。用过去时表示虚拟语气。选C。