Change correctly the underlined words as indicated

I've a brother which is at school. (Relative Pronoun)

Fill in the blanks with appropriate preposition:

All his efforts ended ___ smoke

Translate into English:

আমি তাহার নাড়ি নক্ষত্র জানি।

Fill in the blanks with appropriate preposition or article.

Dhaka is on ___ bank of Buriganga.

Translate into English :

সে এরূপ বলেছে বলে আমি দুঃখিত।

Fill in the blanks

------- Earth moves round ----Sun.