题文
—Are the new machine working?
—Yes. Three million tons of coal________exploited every year in the city.
| A．is |
| B．are |
| C．has |
| D．have |
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—Are the new machine working?
—Yes. Three million tons of coal________exploited every year in the city.
| A．is |
| B．are |
| C．has |
| D．have |
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