Okay, let's complete the sentences:
1. A: Would you like to play a **board** game?
B: Great idea! What about Monopoly?
*Explanation: 'Board game' is a common phrase referring to games like Monopoly that use a board.*
2. A: Let's play cards.
B: No way! You always **win**.
*Explanation: The phrase 'you always win' fits the context of someone being consistently victorious in a game.*
3. A: How about playing backgammon?
B: Oh no. I think it's very **boring**.
*Explanation: 'Boring' is the most suitable word to express a lack of interest in playing backgammon.*
4. A: Do you want to play **scrabble** with me?
B: I'm sorry I can't. I've got lots of things to do.
*Explanation: 'Scrabble' fits the context as it is a well-known game that people play together.*
5. A: I've got a present for you.
B: Thank you. I'm mad about jigsaw **puzzles**.
*Explanation: 'Jigsaw puzzles' is a common type of puzzle that a person can be 'mad about', indicating they like it a lot.*