We often have to stay up for our study though we to have enough sleep.A. toldB. have toldC

问题补充：

We often have to stay up for our study though we to have enough sleep.

A. told

B. have told

C. are told

D. are telling

答案：

A. told

B. have told

(答案→)C. are told

D. are telling

解析：考查动词语态。句意为：尽管总是让我们睡眠充足，但是我们经常不得不熬夜学习。句中we是动词tell的承受者，使用要用被动语态。故选C。