问题描述:
Are they living in China?
Mum is,but Dad works in Sydney.He is coming soon.
为什么用mum is,不用mum does,还有什么情况用is,什么情况用does?
Mum is,but Dad works in Sydney.He is coming soon.
为什么用mum is,不用mum does,还有什么情况用is,什么情况用does?
问题解答:
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