A—phone book B—tools
C—calculator D—message saving
E—phone setting F—backlight setting
G—key lock H—automatic redial
I—sound volume J—ring type
K—voicemail L—additional functions
M—own number N—alarm
O—new message P—network
Q—delete all

A．to sleep with a bright light on
B．to plan sleep patterns carefully
C．to avoid being disturbed at work
D．to sleep for a long time after work

A．They are not available for travelling outside the US.
B．Travellers should buy their tickets in person.
C．Babies can not travel free with their parents.
D．They have the exact travel date on them.