Correct the following sentences:

This is an unique oppotutnity.

Write your joining letter to the Divisional Commissioner office mentioning your post.

বাংলায় অনুবাদ করুন: Grasp all, lose all.

Translate into English:

সে সাঁতার কাটতে জানে না

Give synonyms for the following words and make sentences with the synonyms of the following words and phrases (any five) :

Judicious

Write an essay on 'Climate change: causes and effects'