有一道英语选择题有困难,求帮忙A college student and his roommate ____ for three days last december by two men.A.were kidnapped and heldB.had been kidnapped and heldC.have been kidnapped and heldD.were kidnapped and had been held
问题描述：
有一道英语选择题有困难,求帮忙
A college student and his roommate ____ for three days last december by two men.
A.were kidnapped and held
B.had been kidnapped and held
C.have been kidnapped and held
D.were kidnapped and had been held
答