Fill in the blanks with suitable words:

The earth is a vast planet. It is (a)_________ in shape. One third of its total area is land while the other three portions are covered with (b)_______ . The water areas are divided into oceans, seas and (c)___________ . The surface of the land area is (d)________ of variety. There are high hills, green forests (e)________ stretches of deserts. The land mass is divided (f)________ some continents. Under each continent, there are a (g)_______ of countries. The interior of the earth is (h)_________ in mineral resources. There is existence of life only on (i)_________ earth. But, this existence of life would be impossible (j)__________ sunlight. In fact, sunlight is the prerequisite for the existence of all types of living beings.

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.