whose pens are these?____(these/they) are mine

问题描述:

whose pens are these?____(these/they) are mine
whose pens are these?____(these/they) are mine
these和they 两者皆可吗?抑或只能用they?若只能用they为什么?

答案:They
问句中的these 要用代词 they 去代替.
如果单是个肯定句可以用 these/ they,但在问答中只能用 they
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