语音知识（共5小题；每小题1分，满分5分）
come
cold B. cock C. comfort D. improve
dead
A. eager B. great C. least D. health
united
A. use B. ugly C. upstairs D. put
ours
A. outside B. cousing C. nervous D. clocks
thirty
A. theatre B. thus C. although D. feather
语音知识（共5小题；每小题1分，满分5分）
come
cold B. cock C. comfort D. improve
dead
A. eager B. great C. least D. health
united
A. use B. ugly C. upstairs D. put
ours
A. outside B. cousing C. nervous D. clocks
thirty
A. theatre B. thus C. although D. feather
【小题1】C
【小题2】D
【小题3】A
【小题4】B
【小题5】A
略