1.The phoneme /n/ in the first word of all the following phrases changes to /m/ except ------
A,clean bill B,clean house C,green wood D,green pepper
2.Which of the following sets of phonetic features characterize the English phoneme/i:/?
A,[low,front,rounded] B[high,back,rounded]
C,[low,back,unrounded] D[high,front,unrounded]
答案B,D