Complete the text adding suffixes, prefixes or both with the root words given in the parenthesis.

 Everybody knows that (a) ----- (smoke) is a (b) ----- (danger) bad habit. It is (c) ------ (harm)to health. It is also (d) ----- (cost).A (e) ----- (smoke)should not smoke (f) -----(public)Smoking creates (g) ---- (pollute)A single puff of cigarette contains (h) -----(numerable) harmful particles, that cause many (i) ----- (respirator)diseases which are incurable. But there are many people who are (j) ----- (aware) of the bad effects of smoking.

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.