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1. I have an allergy to seafood, so I can't taste it.
2. The test is very difficult, but I think I will pass it.
3. Tomorrow is my sister's birthday, so I am making a cake for her.
4. The phone didn't work well, so Ann sold it and bought a new one.
5. My grandmother is old and strong.
6. Stop smoking, or you will suffer from lung cancer.
7. I want to meet friends, so I call them for a date.
8. He is an intelligent doctor and a loving father.
9. Read more books, or you will learn new things.
10. I want to travel around the world, so I am saving money from now.
So : vì vậy, vậy nên
And : và
Or : hoặc, nếu không
But : nhưng