作业帮three tons of coal was/were exported 哪个对
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 16:52:53
three tons of coal was/were exported 哪个对
three tons of coal was/were exported 哪个对
three tons of coal was/were exported 哪个对
应该是were.
因为词组的中心词是tons.
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来源：学生作业帮助网 编辑：作业帮 时间：2024/05/03 16:52:53
three tons of coal was/were exported 哪个对
three tons of coal was/were exported 哪个对
three tons of coal was/were exported 哪个对
应该是were.
因为词组的中心词是tons.