turn red
变红了
on one's way to an exhibition
某人去展览馆的路上
get on a bus
乘上公共汽车
get off
下车
each other
相互
in front of
在。。。之前
give one's seat to an old lady
把座位给一位老奶奶
young pioneer
少先队员
look up
抬头看
stand up
站起身来
over and over
一遍又一遍地
2003/12/11
第四课