(3) remembered: "This may be why I remembered Siobhan well, as she was one of the (4)..."

(4) special: "...as she was one of the special pupils I ever taught."

(5) beautiful: "She was a beautiful performer and always played the piano..."

(6) beautifully: "...played the piano beautifully, despite a few wrong notes."

(7) occasion: "I remember one occasion when some boys outside the hall started..."

(8) banging: "...started banging on the window."

(9) decided: "They decided to come in and listen instead."

(10) performing: "She always said she was nervous of performing or singing in front of people..."

(11) all: "...but all she needed was little encouragement."

(12) let: "She never let me down."

Vậy đoạn văn hoàn chỉnh sẽ như sau:

"This may be why I remembered Siobhan well, as she was one of the special pupils I ever taught. She had a mind of her own, even then. She was a beautiful performer and always played the piano beautifully, despite a few wrong notes. I remember one occasion when some boys outside the hall started banging on the window. Siobhan saved the day. She turned round and started singing for them. They decided to come in and listen instead. She always said she was nervous of performing or singing in front of people, but all she needed was little encouragement. She never let me down. She had long hair, which was right down her back."

Filling in the blanks:

1. (2) welcoming - This part seems complete.
2. (3) found - "I found Siobhan well" means the speaker discovered that Siobhan was doing well.
3. (4) most - "one of the most pupils I ever taught" suggests that Siobhan was one of the best students.
4. (5) natural - "She was a natural performer" means she had a natural talent for performing.
5. (6) beautifully - "She always played beautifully" indicates that she played the piano very well.
6. (7) occasion - "I remember one occasion" refers to a specific time when something happened.
7. (8) knocking - "some boys outside the hall started knocking" suggests that the boys were making noise.
8. (9) agreed - "They agreed to come in and listen instead" shows that the boys changed their minds and decided to listen.
9. (10) many - "She was nervous of many people" means she felt anxious around a lot of people.
10. (11) all - "all she needed was little encouragement" suggests that she only required a small amount of support.
11. (12) let - "She never let me down" means she never disappointed the speaker.