Viết lại câu 1. I'm sure he hasn't retired yet. He still leaves the house every morning => He must ... 2. I'm sure he does a lot of gardening. He is certainly an expert => He must ... 3. I'm sure he is working in his garden now. I can hear someone is digging. => He must ... 4. Look at those lights and cameras. Ah! Now I understand. They are making a film. => They must ... GIÚP MÌNH VỚI MÌNH ĐANG CẦN GẤP

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