People are fond of travelling. So: travelling has been popular with man from the (a)___  immemorial. It is the romance of seeing the (b)___ , knowing the unknown and unveiling the  shrouds (c)___mystery. A man hardly knows his (d)___land completely until he has gone out of  it to (e)___ other countries. Only a rational comparison of our country (f)___ other countries can vividly specify the true nature (g )___ merits and demerits of our own motherland. An awareness of our defects inspires us to (h)___hard and improve (i) ___ Unhappy condition of our dear (j)___. (Fill in the blanks)

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.