UNIT 2. FRIENDS FOREVER » Стр.35 (5a)

5. a) Guess and write the phrases. 1. To understand something – to catch something; 2. To call someone – to give someone a call; 3. To speak louder – to speak up; 4. To wait on the phone – to hold on; 5. To tell someone news regularly – to keep someone posted; 6. To write someone a short informal message – to drop someone a line.