Bài 3: Điền động từ khuyết thiếu “mustn’t” hoặc “don’t have to“ vào chỗ trống để hoàn thành các câu sau. You _______________pick me up tomorrow. I will take a taxi. Look at that sign! You ___________ walk on the grass. You __________ blame anyone for your mistakes. You need to be responsible for yourself. You __________ be absent from class tomorrow because the teacher will check your attendance. I ____________ prepare dinner because we will eat out tonight. You _________ leave any rubbish here. It is forbidden. You __________ let anyone know that. It is a big secret. You __________ come early tomorrow because the event will start late. You __________ park your car here. There is a”No parking sign” We don’t have much money left. We _____________ waste anymore. They __________ forget their homework at home. I ____________ do the housework because I have a maid do it for me. They ____________ break the rule that way. It is unacceptable. I ____________ use the computer after 11pm because my mother doesn’t allow me to. You __________ buy that book. I will lend you mine.