The river is said __________ in a fire during the past 10 years.
A.to have polluted | B.it has been polluted |
C.to pollute | D.to have been polluted |
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The river is said __________ in a fire during the past 10 years.
A.to have polluted | B.it has been polluted |
C.to pollute | D.to have been polluted |