Tense & Sequence of Tense

06. Fill in each gap of the following passage with appropriate word(s) from the basket given below:
pollutes
discharges
waste
free
dumped
since
paid back
toxic
because of

Dhaka city___ the bounty of the river Buriganga by
sucking life out of it. According to newspaper report, the Buriganga is dying___ pollution. Huge quantities of___ chemicals are___ into the river every day. The city___ about 4500 tons of solid waste every day and
most of it is directly released into this river. 

Ans: Paid back, because of, toxic, dumped, discharges.

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