ইংরেজি ২য় পত্র প্রশ্ন

6.

Use appropriate sentence connectors in the blank spaces of the following passage.
Air is an important element of our environment. (a) ---, clean air is essential for our life. (b) ---, air is polluted in many ways. (c) ---, one thing that pollutes air is smoke. Smoke is produced from different sources. (d) ---, we make fire to cook food and it creates smoke. (e) ---, buses and trucks plying in the roads emit smoke. (f) ---, the burning of coal in the railway engine also produces smoke. (g) ---, the mills and factories also produce a huge amount of smoke. (h) ---, we melt tar for road constructions which produces black smoke. (i) ---, all these smokes mix with the air and pollute it. (j) ---, smoke from different sources is causing serious harm to our environment.