Module 2. Teen life » Стр.22 (E)

E. Use the phrases to complete the email below. Hi Becky, I've got a problem with my biology homework. I’m (1) having trouble reading the chapter about research on the brain. I don’t really understand (2) what makes brains so special. I know that (3) an adults brain is different, but I’m not sure about the best period for learning new skills. I’m free after 5 p.m. today, so can you give me a call then? Don’t (5) suddenly disappear, OK? Take care, Johnny