Airplane design is a job ______ you to work 10 to 12 hours a day and sometimes seven days a week. —_______. I think airplane design needs good teamwork as well. [ ]

The math problem was easy for me work out. [ ]

What makes you so happy today, Jack? — Because my teacher says I am _______ honest boy.

London is famous ________ Big Ben, Buckingham Palace. [ ]

While listening in class, you should concentrate_____ your teacher. [ ]