— Why does the river smell terrible?
— Because large quantities of polluted water _______ into it.
A.have poured | B.is being poured | C.has been poured | D.have been poured |
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— Why does the river smell terrible?
— Because large quantities of polluted water _______ into it.
A.have poured | B.is being poured | C.has been poured | D.have been poured |