get up to something

Từ điển Oxford Advanced Learner 8th

ˌget ˈup to sth derived
1. to reach a particular point
• We got up to page 72 last lesson.
2. to be busy with sth, especially sth surprising or unpleasant
• What on earth will he get up to next?
• She's been getting up to her old tricks again!
Main entry: ↑get_derived