1.

Direction: Choose the correct option for the fill-up number ____(89)____.Sanitation and hygiene are also important ___(86)___ the well-being of society and for biodiversity conservation. The government has ___(87)___ a programme. It aims to develop ___(88)___ riverfronts. It will solve the problem of pollution ___(89)___ the rivers. The need has been ___(90)___ for a long time.

A. in
B. on
C. onto
D. by
Answer» B. on


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