Elementary Grammar Exercise

Modal - Set:3 Must Mustn't

 Question
Exercise: Fill in with must or mustn't.

 Answer Sheet
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1. We ___ learn this lesson by heart.
2. You ___ work hard to learn English.
3. You ___ cut down the tree without licence.
4. Jenny worked all day; she ___ be tired.
5. I ___ go to head office tomorrow.
6. The teacher told Jack that he ___ make the mistake again.
7. Mother isn't in the house; she ___ be out shopping.
8. The computer doesn't work now. There ___ be something wrong with it.
9. I am sorry, but you ___ smoke here.
10. You ___ pick the flowers in the garden.

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