This document contains an exercise to match time expressions with their meanings and fill in blanks with the correct time expressions. It provides a table matching 12 time expressions like "24/7" and "last time" with their meanings. There is then a section filling in 10 blanks with the appropriate time expression from the table, like "two week's notice" and "the day before yesterday". Finally, it prompts writing 3 original sentences using time expressions and checks the answers.