B. Reading comprehension

Read the article about ‘can’ and ‘must’ on pages 16-17 of English Now No 102. Then, choose the correct verb to change the sentences below into the past form.

1. They must take a taxi.
- a. had to
- b. were allowed to
- c. were able to
2. I can't read without glasses.
- a. wasn't allowed to
- b. weren't able to
- c. wasn't able to
3. She can drive her parents’ car.
- a. has to
- b. was allowed to
- c. wasn't allowed to
4. He can sing very well.
- a. could
- b. had to
- c. was allowed to
5. You needn't wait for us.
- a. didn't have to
- b. had to
- c. mustn't

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