这里的that与平时讲的意思有所不同.
当所指的人不确定时,（如：电话里,或只是听到某人的声音）,这时代词都要用that,而不用those,更不用they,而无论其是否单数.
答句用复数,那是因为回答者心中清楚那个“that”实实在在是他的父母亲.
考试出的题目,它总会有个上下文的,根据上下文可以确定填什么.
is that your parents 还是are those your parents?
2个回答
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