What is the synonym of the word “knave”?

Use right form of verbs:

They came home while I (study).

Translate into English:

টাকায় বাঘের দুধ মেলে।

What is the superlative degree of 'Costly!?

Put the right form of verbs in the blanks:

The thief (to be) punished for snatching.

Draft a letter to the editor of a daily newspaper drawing attention of local authority on the water stagnation problem in your area.