3.5Each stone weigh as much as two and a half tons.weigh错了应该改为 为什么

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3.5Each stone weigh as much as two and a half tons.weigh错了应该改为 为什么
3.5Each stone weigh as much as two and a half tons.
weigh错了应该改为 为什么

3.5Each stone weigh as much as two and a half tons.weigh错了应该改为 为什么
weigh---weighs三单现