As students we should work hard and do best to realize our dreams. A. usB. ourC. oursD.

问题补充：

As students, we should work hard and do best to realize our dreams.

A. us

B. our

C. ours

D. ourselves

答案：

A. us

(答案→)B. our

C. ours

D. ourselves

解析：句意：作为学生，我们应该努力学习，尽力去实现我们的梦想。do one’s best(尽力)，是一个词组，这里的one’s表示所有格，所以本题选B。