I think students to do homework with friends.A. is allowed B. are allowedC. should allowed

问题补充：

I think students to do homework with friends.

A. is allowed

B. are allowed

C. should allowed

D. should be allowed

答案：

A. is allowed

B. are allowed

C. should allowed

(答案→)D. should be allowed

解析：句意：我认为不应该允许孩子们和朋友们一起做作业。结合语境可知从句为虚拟语气，主语是动作对象，故用被动语态。选项B描述的是客观事实，故选D。