—It smells terrible. What has happened here?
—Look, there is much waste gas _____ from the chemical factory.
| A．pour | B．pouring |
| C．poured | D．pours |
—It smells terrible. What has happened here?
—Look, there is much waste gas _____ from the chemical factory.
| A．pour | B．pouring |
| C．poured | D．pours |
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