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Underline the model verbs you choose:
Life started in the ocean, but humans aren't natural swimmers. We (1. can - can't - must) swim as babies, but we forget and then we (2. musn't - should - must) learn to swim again.
We (3. should - can - musn't) foget that our world is mainly water. So we (4. ought to - must - should) all learn to swim. We (5. can - must - musn't) try to stay away from water, but it is very difficult. The time always comes when we (6. should - must - can) cross water.
We (7. should - must - can) learn to swim when we are young. It is easier to learn then. Our parents (8. can - must - musn't) help. They (9. shouldn't - ought not to - should) give us the opportunity to learn to swim.
2 complete the sentence with"must,musn't,should,shouldn't'
1 children........mustn't...play in the street
Harm of cigarette
Usually, adults and old persons and even students (are smoking) ->smoke . I think they use cigarette because they don't know it's harm, they think it's very cool or it's relaxed them,... But it's very harmful for (your health->them). It's will made your lung bad if you used->are using cigarette for a long time. Moreover, You will get addiction. If you are in addiction, you will be(bỏ be) made(make) your family and society become bad. So we need to don't use cigarette.(Câu này sai, sửa lại cho đúng nha)
1. Cigarette musn't be _advertise_ on TV. ( advertisement)
2. _Occasionally_, I will have a piece of chocolate, but this is quite rare. ( occasion)
1 advertised
Câu bị động với V khuyết thiếu must