These aren’t cards. They’reA. ours theirB. our theirsC. our theirD. ours theirs

问题补充：

These aren’t cards. They’re

A. ours, their

B. our, theirs

C. our, their

D. ours theirs

答案：

A. ours, their

(答案→)B. our, theirs

C. our, their

D. ours theirs

解析：ours名词性物主代词,我们的;their形容词性物主代词,他们的;our形容词性物主代词,我们的;theirs名词性物主代词,他们的. 结合语境可知前一空用形容词性物主代词作定语，后一空用名词性物主代词做表语．句意：这些不是我们的卡片．他们是他们的．