Complete the following passage with suitable verbs from the box. Put them in the correct tense. Use the negatives where necessary.

achieve	wait	stay	build	give
writing	come	held	strive	limit

Knowledge is like a river that (a) _____ in one place for long. Scholars (b) _____ to keep knowledge flowing to everyone. They (c) _______ many books, articles, and ideas to spread learning. Libraries (d) ______ countless treasures of wisdom for seekers. Teachers will (e) _______ lessons to inspire their students. But knowledge is something that never (f) _______ to those who refuse to learn. It never (g) ______ . People can (h) ______ machines and buildings, but they are (i) ______ by ignorance. They (j) _______ nothing without understanding and effort.

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.