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。
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。
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。
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。
