【题目】feather
A.warmth
B.method
C.theory
D.breathe

【答案】D
【解析】th在词中并且后面接er时，或者最后一个字母是不发音的e时，通常也发浊辅音。例如feather, weather, whether, leather, further, father, bathe, breathe, southern, northern, either , mother,another, brother等。故选D。