Sure! Here are the best answers to complete each of the sentences from your exercise:

1. **A. getting/stay** - "I don't like getting up early in the winter days. I love staying in bed late."
2. **D. pick** - "My brother is learning to pick a horse at the moment."
3. **C. How** - "How does Hoa Ban festival take place? - In Lai Chau."
4. **B. badly** - "Mai studies Maths a little bit badly."
5. **C. help** - "Why don't we help our parents with some DIY projects? - I think it's useful."
6. **A. saw** - "I saw an elephant at the zoo yesterday. The elephant was so cute."
7. **C. more crowded** - "The streets in the cities are more crowded than those in the countryside."
8. **B. staying** - "Do you fancy staying around the West Lake with me this Sunday morning?"

Let me know if you need any further assistance!