1. It's raining; however, my father still goes to work. Or: It's raining, but my father still goes to work.

2. She has more money; therefore, many buys this house. Or: She has more money, so many buys this house.

3. My sister is keen on making a cake in the afternoon.

4. It takes them all their free time to do DIY.

5. Nam sings better than his brother.

9. It's raining, but my father still goes to work.

10. Many buy this house, so she has more money.

11. My sister is keen on making a cake in the afternoon.

12. It takes all their free time to do DIY.

13. Nam sings better than his brother.