Sure! Here are the answers along with explanations for each question from the text you provided:

### Sentence Completion:

**15.** He'd like ___ the Louvre museum with his family this weekend.
**Answer: A. to visit**
*Explanation: "To visit" is the correct infinitive form that follows "He'd like," expressing a desire to do something.*

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**16.** Mr Buong adores ___ dogs with fish in the morning.
**Answer: D. being fed**
*Explanation: "Being fed" is the gerund form, indicating the action he loves to do.*

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**17.** He is 18 years old now. He hates ___ like a small kid.
**Answer: A. to treat**
*Explanation: "To treat" fits here as it indicates an action he does not like.*

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**18.** In Summer, Mr Buong would prefer ___ with local people rather than ___ in a five-star hotel.
**Answer: D. to stay - staying**
*Explanation: "To stay" is the correct infinitive form and keeps the parallel structure with "staying."*

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**19.** Mono is ___ on chatting with Mr Buong at the weekend.
**Answer: C. interested**
*Explanation: "Interested" is the correct adjective showing he has a positive feeling towards the activity.*

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**20.** In my free time, I would rather ___:
**Answer: C. go to the cinema - visit the museum**
*Explanation: "Go to the cinema" is a preferred action compared to "visit the museum."*

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**21.** He is keen on football so much that he goes to every match of his favourite team.
**Answer: A. is interested in**
*Explanation: "Is interested in" accurately describes enthusiasm towards football.*

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**22.** What do you like doing in your leisure time!
**Answer: C. I often listen to music and play basketball with my friends.**
*Explanation: This links nicely to leisure activities.*

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**23.** The most unpopular evening out among teenagers is going to the cinema.
**Answer: D. boring**
*Explanation: "Boring" describes the negative connotation of an unpopular activity.*

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**24.** She’s a sociable child who loves to talk to anyone.
**Answer: A. outgoing**
*Explanation: "Outgoing" describes a sociable and friendly nature.*

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### Multiple Choice Questions:

**25.** "Which skills do you need for your job?" - Ba:
**Answer: A. Good luck**
*Explanation: This fits best as a response indicating positivity.*

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**26.** Mary: "Thanks a lot for your sound advice." - John:
**Answer: C. That’s all right**
*Explanation: This is a common polite response to a thanks.*

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If you need further clarifications or more help, feel free to ask!