What is the probable relationship between John and Sarah?
A. Neighbors.
B. Fellow workers.
C. Husband and wife.
这是来自2021年新高考考试英语全国乙卷（全国卷I）的听力对话录音原文的句子。
请问这里的 Husband and wife 为何不需要冠词啊！它们不是可数名词吗？它可还原成句子吗？
譬如说成：They are husband and wife. 如此也不需要冠词吗？
依据英语习惯，“成对”的名词并列用时，习惯上不需要冠词。
在近10年的高考考试题（主如果听力题）中出现过的类似表达有（侧重彼此间的关系，不指具体的人)：
Wife and husband.
Husband and wife.
Brother and sister.
Boss and secretary.
Boss and clerk.
Employer and employee.
Teacher and student.
Headmaster and teacher.
Doctor and patient.
Nurse and patient.
Host and visitor.
Manager and customer.
Guest and receptionist.
Parent and child.
Father and daughter.
Customer and saleswoman.
Guide and tourist.
Parent and teacher.
Driver and passenger.
Salesperson and customer.
如此的表达即便还原成句子，也不需要冠词。如：
They are brother and sister. 他们是兄妹。
I’d seen them together so often I drew the logical conclusion that theywere husband and wife. 我常看见他们在一块，所以觉得他们是夫妻。
不过，假如指多人，则用复数。如：
Many of them were doctors and nurses. 他们中的很多人是大夫护士。
The children made believe they were princes and princesses. 孩子们假装自己是王子和公主。
