重点讲解：
1. used to do
过去常常；过去曾做某事；
eg. People used to come and visit him every day.
人们过去每天都来拜访他O,fpo0qbyZVkp。
He used to be one of the professors at the School of Education.
他曾是教育学院的一名教授U%2Uij70pu1%gyTmNc。
2. look like
看起来与（某人或某物）相像（相似）；
eg. It is smoothly contoured to look like a racing car.
这辆车外形设计流畅，看起来像赛车=oAt4QM16rJb1XPxmv。
eg. Her new glasses make her look like an owl.
她的新眼镜让她看上去像只猫头鹰Ju=*Ew.rDq50Ef。