Which sounds are interdental sounds?（ ） A./f/ & /v/ B./t?/ & /d?/ C./θ/& /?/ D./s/ & /z/ Which sounds are interdental sounds?（ ） A./f/ & /v/ B./t?/ & /d?/ C./θ/& /?/ D./s/ & /z/ 正确答案：C
