get used to习惯于。
have a crush on someone迷恋某人。
have seen better days今非昔比。
keep a straight face板着脸。
Lose one’s cool沉不住气。
make a habit of sth./doing sth.使...形成一种习惯。
make an exhibition of oneself出洋相。
play fast and loose with...敷衍了事,不正经干。
play favorites with...对……有偏心眼。
Play it cool不露声色，沉着冷静。
take…into account(=consider)把...考虑进去。