Use because or although to complete the following sentences. Each sentence must have a logical meaning.

1. He is very tired he didn't sleep last night.
   
   
2. We didn't buy the dictionary it was very expensive.
   
   
3. the computer was very inexpensive, Robert decided not to buy it.
   
   
4. They are going to have a picnic the weather is cold.
   
   
5. Barbara never smiles, she is very popular.
   
   
6. Janet is very happy she has a better job.
   
   
7. Robert still smokes his brother has cancer.
   
   
8. She is very rich she has won the lottery.
   
   
9. Fred does not speak Italian he has lived in Italy for many years.
   
   
10. He is fat he eats too much.