When you read the book, you’d better make a mark _____ you have any questions.
What you need most is to_______ what you have learned to your work.
Our headmaster accepted the suggestion by students.
Tom didn't want to make trouble in the train. Therefore, he his railway ticket when asked to do so on his way home.
Many teens don't get enough sleep because they have too much homework, which______them up at night.
They were completely __________ by the story he made up.