1、Unit three Sports and fitness Vocabulary keep fit be fit/suitable for -ess 表示“女性的，雌性的 actor-actress waiter-waitress prince-princess keep track of lose track of keep in contact with lose contact with in honour of=in ones honour its ones honour to do sth be/feel honoured to do sth determine to do sth
2、the determination to do sth be determined to do sth lose ones heart to put ones heart into sth from the bottom of ones heart compete with sb compete for make no sense = not make any sense there is no sense (in) doing sth 表示确切的数目时，具体数字+可数名词复数 five million dollars 表示不确定的数目时，millions +of+ 可数名 词复数 millions of students cheat sb of sth cheat sb into doing sth go on a diet 表动作 be on a diet 表状态 a healthy diet
