Phân biệt các từ vào hai nhóm sau:

thief, teeth, leather, thing, mouth,
they, father, this, health, smooth,
than, thirsty, there, other, through,
three, cloth, thigh, those, either,
month, three, breath, width, strength,
another, author, together, with, breathe
           /θ/                                  /ð/
                                             
 
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