вставьте частицу to перед инфинитивом где необходимо
1)children like ... play toys.
2)they wanted ... cross the river.
3)john must .... clean his room every day
4)my friends can ... speak italian.
5)what makes you ...think you are right.
6)would you like ... buy this souvenir for you mum?
7)let me ... call you when you are free