1. What are should, ought to, must, have to used for? Write the correct words (should, ought to, have to, must) in the space. 2. Complete the sentences with should, ought to, must, have to. 3. Complete the dialogue with the words/ phrases given in the box. You can use a word / phrase more than once. 4. Write five sentences about what you and your family can do to reduce global warming. Use should, ought to, have to, must.
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