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9 Complete the sentences with the correct comparison form of the words in the brackets. (Hoàn thành câu với dạng so sánh đúng của từ trong ngoặc)

1. That flight ticket is (expensive) ______ of all.
2. Tom's suit is (style) ______ Bob's.
3. They bought (cheap) ______ petrol they could find.
4. There isn't a house (large) ______ than this one.
5. It was (boring) ______ film I have ever seen.
6. It's becoming (difficult) ______ for me to keep up.
7. The more you water this plant, (fast) ______ it will grow.
8. From now on, we won’t be able to go out (much) ______ as we will.
9. The red book is (price) ______ the white book.
10. Her book costs three times (cheap) ______ mine.
11. Andrew is not (age) ______ Lily.
12. Tony is twice (talkative) ______ John.
13. Last week was so (hot) ______ this week.
14. I didn’t arrive so (early) ______ I expected.
15. His illness was much (serious) ______ we had thought at first.