Fill in the blanks with words from the box. You may need to 0.5×10-5 change the form of some of the words. 

to	an	moreover	differ	irrigate
us	wood	fish	on	diverse

The environment is everything around us. Trees in the hills and forests are the part of our environment. They give us (a) ________ and oxygen. We grow (b) ______ crops (c) ______ vast plane land. We get (d) ______ from the rivers, haor-baor and canals.(e) ______ , these water-bodies help (f) _______ travel, transport goods and (g) _____ land. All these (h) ______ elements of environment together play (i) _____ important role (j) ______ maintain environmental harmony. 

We are not ungrateful to the freedom fighters.

Their contribution is the greatest thing. 

An imperative sentence expresses a command, request, advice, or suggestion. It typically starts with a base form of a verb, and the subject 'you' is often understood but not stated. To form a negative imperative, 'Do not' or 'Never' is placed at the beginning of the sentence.

In the given sentence, "You should never disrespect or forget our martyrs," 'should never' indicates a strong suggestion or advice against an action. To transform this into an imperative sentence, we remove the implied subject 'you' and the auxiliary 'should', directly starting with 'Never' to convey the strong negative command or advice.

Our government has built the national memorial with a view to paying tribute to their memories. 

 (e) A freedom fighter is greater than any other son of the soil.

Our independence was got/gotten by us for their sacrifice.