4.Why can the author be contacted even in his car? Key:Because he carries a beeper and a mobile phone with him. 5.Have modern conveniences also put an increased burden on people?Why? Key:Yes.Because people have more work to deal with, such as reading and answering emails,making and answering phone calls,etc. 4. Why can the author be contacted even in his car? Key: Because he carries a beeper and a mobile phone with him. 5. Have modern conveniences also put an increased burden on people? Why? Key: Yes. Because people have more work to deal with, such as reading and answering emails, making and answering phone calls, etc