
①oo发长音[u:]的单词有:
aftesnoon、balloon、bloom、boom、boost、food、shoot、boost、snook、snooker、spoon、 spook、pool、cool、school;
②oo发短音[u]的单词有:good、hood、book、stood、understood、wood、foot、soot、wool、book、look、took、cook、shook、brook;

①oo发长音[u:]的单词有:
aftesnoon、balloon、bloom、boom、boost、food、shoot、boost、snook、snooker、spoon、 spook、pool、cool、school;
②oo发短音[u]的单词有:good、hood、book、stood、understood、wood、foot、soot、wool、book、look、took、cook、shook、brook;