The students are from England and maths teacher is from China.A. theyB. themC. theirD. th

问题补充：

The students are from England and maths teacher is from China.

A. they

B. them

C. their

D. theirs

答案：

A. they

B. them

(答案→)C. their

D. theirs

解析：句意：那些学生来自美国，他们的数学老师来自中国。A. they他们（主格）；B. them他们（宾格）；C. their他们的（形容词性物主代词）； D. theirs 他们的（名词性物主代词）。

故选C。