Complete the sentences with must or mustn't 1.This sign says "No left turn ".We ............... ............... go straight ahead or turn right. 2.It's eleven o'clock . My parents aren't at home.I ........... cook lunch. 3.My hair is very dirty.I ............ wash it now. 4.Tome ................. help you with your homework .You .................... do it yourself . 5.You ................. drive fast,there is a speed limit here. 6.We .................. go to school on time. 7.You ................. talk to other students during the exam . 8.Faemers .................. get up early ,at four or five o'clock in the morning. Ai trả lời đúng, nhanh nhất mik sẽ cho ctlhn nha