12. Скажите, где следует употребить as, а где than.
1. Our warm-up is a bit more difficult … yours. 2. Their room in the hostel isn't … big … ours. 3. She isn't … busy … I am. 4. Great Britain is smaller … Russia. 5. The Arctic Ocean is colder … the Indian Ocean.
6. Chinese is more difficult … English. 7. He isn't … tired … you are. 8. His work isn't … difficult … mine. 9. Jack isn't … strong … he thinks. 10. She isn't … punctual … her mother. 11. Our task isn't … difficult … theirs. 12. Her performance is much more interesting … his. 13. This book is more expensive … that one.