are they apples?改为单数形式
are they apples?改为单数形式
they are apples改为单数
把They are apples.改为单数句
are these apples?改为单数形式
these are apples 改为单数形式
These are apples改为单数形式
what are they?they are apples改为单数句
They have many apples.(改为单数形式)
请问They are American apples.的单数形式
they are English books.(改为单数形式)
They are his friends改为单数形式
They are Chinese【改为单数形式】