A、
21 years old.
B、
5 years old.
C、
17 months old.
D、
5 months old.
【正确答案】
C
【答案解析】
解析：新闻中提到17个月大的双胞胎姐妹终于回到危地马拉过上新生活，由此可知C项正确。
A、
They were separated by the US doctors.
B、
They were born with joined heads.
C、
Their father is too young to bring them up.
D、
They were sad to leave the staff.
【正确答案】
B
【答案解析】
解析：新闻一开始就说有对双胞胎头部连在一起(Twins born joined at the head)，之后又再次提到双胞胎自出生起头就连在一块(born joined at the head)，所以她们是头部相连的连体婴儿，应选B项。
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