分类：教育/科学-学习帮助
问题：两个都对吗？说说理由What'sthis?___________ 
What's this?____________A. Yes , is.    B. It's an ID card.C. Is it a watch? D.This is a watch.应该是B和D都对吧？
回答：D 不对.英语中为了简洁,问答What's this 和 What's that 时不用This/That is ,只用It's.