Đáp án:
1. /ɪd/: visited, decided, wanted, fitted.
2. /t/: stopped, closed, asked, looked, walked, washed, laughed.
3. /d/: enjoyed, played, lived, tried, listened.
Giải thích:
1. /t/, /d/ `->` /ɪd/.
2. Các âm vô thanh `->` /t/.
3. Các âm hữu thanh `->` /d/.