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Task 1. Complete the sentcnes with must, mustn’t or needn't. (Điền các câu với must (phải làm gì), mustn't (cấm) hoặc needn’t (không cần) 1. DOCTOR: You……….go on a diet; but you …………..eat sensibly and you…………. overeat. 2. ZOO NOTICE: Visitors……………. feed the animals. 3. TEACHER: You…………………. read the whole book but you…………. read the first four chapters. 4. RAILWAY NOTICE: Passengers……………..walk on the line. 5. SCHOOL NOTICE: The lifts…………… be used in case of fire. 6. DOCTOR: You ……………. take more than two of these pills at once. Three might be fatal. 7. DOCTOR (to patient’s wife): If the pain has gone, he ..................... take any more of these.
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