-- Are the books ? No they belong to .A. yours theirsB. your themC. yours themD. yo

问题补充：

-- Are the books ? -- No, they belong to .

A. yours, theirs

B. your, them

C. yours, them

D. your, they

答案：

A. yours, theirs

B. your, them

(答案→)C. yours, them

D. your, they

解析：此题考查人称代词和物主代词的用法belong to sb 其中sb是人称代词时要用宾格形式。