用who,whose,which,what填空.1.___are late today?2.___classroom is Building 3.___is eight years old?4.___book is your favourite one?

用who,whose,which,what填空.1.___are late today?2.___classroom is Building 3.___is eight years old?4.___book is your favourite one?
用who,whose,which,what填空.
1.___are late today?
2.___classroom is Building
3.___is eight years old?
4.___book is your favourite one?

用who,whose,which,what填空.1.___are late today?2.___classroom is Building 3.___is eight years old?4.___book is your favourite one?
1.who
2.whose/which
3.which/who
4.which

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which
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2,which
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