don't throw away these old newspapers, they might ___useful somesay(be) 用括号中所给词适当形式填空

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don't throw away these old newspapers, they might ___useful somesay(be) 用括号中所给词适当形式填空

don't throw away these old newspapers, they might ___useful somesay(be) 用括号中所给词适当形式填空
don't throw away these old newspapers, they might ___useful somesay(be) 用括号中所给词适当形式填空

don't throw away these old newspapers, they might ___useful somesay(be) 用括号中所给词适当形式填空
be
might 后面 动词要用原形.