Dưới đây là các từ thích hợp để điền vào chỗ trống:

1. **used to** (đã từng)
2. **is** (thì)
3. **recently** (gần đây)
4. **them** (họ)
5. **running** (giày chạy)

Vậy nội dung hoàn chỉnh sẽ như sau:

"I've been running for two years. I used (1) **to** only run 2 or 3 kilometres, but now I run approximately 15. My speed (2) **is** also improving. In London, I (3) **recently** joined a jogging club. I had never met any of the members before, but now I consider (4) **them** my friends. I need to order a new pair of (5) **running** shoes which will be just a simple pair. I don't believe that the more..."