To save class time our teacher has students do half of the exercise in class and complete

问题补充：

To save class time，our teacher has students do half of the exercise in class and complete the other half for our homework.

A. us

B. we

C. our

D. ours

答案：

A. us

B. we

C. our

D. ours

解析：A

解析动词have后缺少宾语故答案为A项，后面的students作us的同位语。