Complete each of the following sentences with a suitable preposition: Rapid run off could take ... valuable soil

Complete each of the following sentences with a suitable preposition:
1. Rapid run off could take........... valuable soil. 
2. I wish to invite you.............. my birthday party next Sunday. 
3. He gets bad cough, I think he should gget rid .............. smoking. 
4. Why don't you tell me............... your problem?
5. The farm is famous................. its production of coffee .