一道SAT语法IS题
(a squadron of newly trained,enthusiastic firefighters from training academies,each year they graduate )to begin work in the nation's cities.
为什么原句不行?要改成 Each year a squadron of newly trained,enthusiastic firefighters graduates from training academies.
a squadron of newly trained,enthusiastic firefighters 谓语为何是单数?
a group of students 难道谓语也是单数吗?