Here are the coordinating conjunctions that can fill in the blanks:

1. Daniel tried to read a book in Thai, **but** it was too difficult.
2. Will you pick me up after work, **or** will I take the bus?
3. My grandfather is quite old, **but** he exercises more regularly than I do.
4. My holiday will be an all-inclusive one, **yet** I don't know much about the city.
5. Did he design the house himself, **or** did he have it designed by an architect?
6. My mother gave me some money, **and** she also gave me a new dress for Tet.
7. She never came to see him, **nor** did she leave him any money.
8. I had failed the driving test once, **for** I was very nervous yesterday.

Feel free to ask if you need further assistance!