Use the appropriate forms of the infinitive.

1. This poem is easy (to memorize). 2. I meant (to ask) you about it long ago. 3. I did not expect (to ask) this question. 4. There were so many things (to do). 5. Don’t worry about him, he is sure (to have) a good time now. 6. Why (not to go) into that matter at all? 7. They are supposed (to experiment) in this field for a year. 8. The teacher expected him (to give) a better answer. 9. The man seemed (to study) me and I felt uneasy. 10. The only sound (to hear) was the ticking of the clock.
11. He must (to read) something funny; he is smiling. 12. They seemed (to learn) the news: they were excited. 13. This book is said (to sell) out already. 14. I am glad (to introduce) to you. 15. The box was (to handle) with care. 16. Her mood seems (to change) for the worse. 17. I am sorry (to disappoint) you. I did not mean that. 18. He is happy (to award) the first prize. 19. He was anxious (to take) the first place in the competition. 10. The poem can easily (to memorize).