To N is Best & other fellows

1. Ahmad worked for his examination carelesslywithout taking breakfast.

2. They forgot about inviting us for the dinner.

3. Although the oil prices fluctuatedthe companies saw a great boom in overall prices.

4. I used to eatbacon and egg in the breakfast.

5. As I was coming out of the building , it beginsrain.

6. I am not concerned withhim in this business.

Please correct me if I am wrong anywhere?