Mọi người làm giúp mk mấy câu dưới đây với ạ Ex1 1 The doctor (must/ mustn't/ have to) get here as soon as he can 2 Do you (have to/ must/ mustn't) work next weekend? 3 Bicyclists (mustn't/ must/ has to) remember to signal when they turn 4 Susan, you (mustn't/ must/ have to) leave your clothes all over the floor like this Ex2 1 You...... use your mobile phone in the exam A. Oughtn't to. B. Mustn't C. don't have to D. Shouldn't 2 We....... open the lion's cage. It is contrary to zoo regulations A. Must B. Mustn't C. Needn't. D.should 3 When swimming in the pool, children...... be accompanied by their parents A. should. B. must C. Don't have to. D. have to 4 If you want to maintain a good relationship, you..... behave impolitely like that A. Ought to not. B. Ought not to C. Ought not to D. Mustn't 5 The children...... spend too much time watching TV A. Mustn't B. Ought to not C. Shouldn't D. Both B and C are correction 6 If you have a bad headchy, you..... see the doctor A. Had better B. Must C. ought D. Have better Ex3 1 It's.......! I've won the the lottery! (BELIEVE) 2 I can tell from your......... that you are not happy (EXPRESS) Ex4 1 you are not allowed to park here -> You............................... 2 It is better for parents to take to understand their children -> parents had.................