Fill in the blanks with suitable words: 

Afforestation means planting or preserving trees. It is just (a) _______ to deforestation. Trees and plants are part and parcel (b) ______ the environment. Ecology (c) ________ depends on them. The country will turn (d) _______ a desert unless there are trees. The trees help to protect the soil (e) ______ erosion. Flood cannot affect those areas (f)______ with trees. Storm cannot (g) _____ its force (h) _____ the places where there are trees. So, we should (i) _____ more and more trees for the (j) _____ of our life. 

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.