1. Judging from/by the tone of her voice, she was running out of patience.

2. After making / Having made / After they have made important decisions, people often feel relieved.

3. People investing / who invest in apartments/flats often make a good / a lot of profit.

4. Houses (that are) built with quality materials are always more valuable.

5. Even though / although (he is) a qualified psychologist, Lewis has been unemployed for two months.

6. Did you see the man in / (who was) wearing the bright yellow suit?