Less vs. Fewer

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Answers

1. I did less work today than yesterday.
2. I earn less than him.
3. There were fewer applicants.
4. Few people can speak a foreign language perfectly.
5. Even fewer people can speak a third language.
6. You should spend less on gadgets.
7. She has fewer friends than I do.
8. The exam was less difficult than I thought.
9. Fewer students participated in the program.
10. I have less energy than I used to.
11. As an actor he is less popular than his brother.
12. We have got less expensive clothes for the fuller figure.