A．They had some problem with their hearts.
B．One of them had some problem with her heart.
C．They had some problem breathing.
D．One of them had some problem breathing.

A.They
B.
B．One
C.
C．They
D.
D．One

【参考答案】

C
解析：根据文章最后提到两个新生婴儿的呼吸有些问题，因此被安置在特护病房，故本题为C 。