用be的适当形式填空:These books in the backpack This his watch .It white
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are,is,is
======以下答案可供参考======
供参考答案1:
areisis祝你进步,有不会的可以再问我哦
供参考答案2:
are is is供参考答案3:
These books (are)in the backpack This(is) his watch .It (is) white
供参考答案4:
These books are in the backpack
This is his watch .
It is white