must [mʌst;məst]
必须
model ['mɔdl]
模特儿
smile [smail]
微笑
联想记忆:The volunteer`s smile is the best name card of beijing这句口号是北京奥运会的志愿者口号
live [liv]
活的
take an umbrella
拿伞
go to the classroom
去教室
clean the classroom
打扫教室
finish the homework
完成作业