Viết dạng đúng của  từ trong ngoặc để hoàn chỉnh các câu sau. (1 điểm)

1. If you spend time watching birds in_________, your hobby is bird-watching(natural)

2. Milk is _______for our health. It is not an unhealthy drink. (well).

3. My younger sister speaks English very_______. (fluent)

4. Nick’s father ___________ a lot of flowers in his garden. (plant)