Cách sử dụng
The expression "cover up" means to hide or conceal something. It could be used in situations where someone has done something wrong or embarrassing and tries to hide it. For example, a student who forgot to do their homework might try to cover up by pretending to be sick. It could also be used in a literal sense, such as covering up a stain on a shirt with a jacket. Overall, "cover up" is used in situations where someone wants to keep something secret or hidden.