These are glasses改成单数
These are our books改成单数
These are American cars 改成单数
These are our books.(改成单数)
those are glasses改成单数句去提问
Whose teachers are these They are ours改成单数形式
What are those? (改成单数形式) These are my shoes.(改成单数形式) It is a
these are my grandfather and grandmother 改成单数形式 快
These are black flowers?怎么改成单数句
Are these pairs of gloves nice?改成单数句
these are some arms(改成单数句)
these are his watches怎么改成单数句
Is this a book 改成复数形式 Those are chairs 改成单数形式 What are these