1. To stop the arms race is the main goal of all mankind.2. I adore skating on a clear winter day.3. I'm sorry to ask you so many questions.4. you do not mind if I open the window.5. this book is worth reading.6. John could not help admiring her smile7. she is tired of doing homework8. I look forward to when we make a tour of Europe9. He used to get up early every day.10. he is very interested in studying foreign languages11. In addition, she collects stamps, she attends a music school12. not viewing the program of telecasts, we did not know the time of the beginning of the film13. they finished working on time