Gerund - Infinitive or infinitive - gerund
8. She spent two years writing this book.
-> It took
9. It took Tom three years to finish his research.
-> Tom spent
10. They spend four months finding this
shop.
-> It takes
11. It takes me 30 minutes to go to school every day.
-> I spend
12. I look forward to going to Paris.
-> I expect
13. I really expect to hear from you soon.
-> I really look
14. We look forward to meeting our cousins again.
-> We expect
15. He expects to buy those books.
-> He looks