1. Although Mr.Nam is old, he is still an active man.
2. Though there was noise outside, the students kept on studying.
3. Eventhough I can't play any instrucments, I am fond of music.
4. I told a joke but nobody laughed.
5. The weather was terrible, therefore, we didn't enjoy the picnic.
6. I understand your point of view, however, I didn't agree with it.
7. People should use more solar energy because it is cheap, clean and unlimited.