Here are the correct answers for each sentence:

1. **A** - She speaks English as **well** as her friend does.
2. **A** - It's **cheaper** to go by bus than by car.
3. **D** - The test is not **as** difficult **as** it was last year.
4. **A** - He works more **slowly** than she does.
5. **C** - This hotel must be **the most expensive** in this city.
6. **D** - David does not have **as much money as** Peter does.
7. **A** - People should eat **less fat - more exercise** to reduce the risk of heart disease.

Please let me know if you need further assistance!