)basket is this?--It's their basket.括号里填什么?()is that?--It's Tom here.()are those?--They are pandas.()are you doing?--I'm very well.

问题描述:

)basket is this?--It's their basket.
括号里填什么?
()is that?--It's Tom here.
()are those?--They are pandas.
()are you doing?--I'm very well.

whose
who
what
how