From this passage, why is it a good idea for children to learn how to use the telephone（）
A. Children have fun dialing.
B. Emergencies happen without warning.
Children can wake their parents.
Dialing can help children with their math study.
What is the most important thing to remember when making a presentation（）
A. Match your presentation to the needs of your audience.
B. Make sure to wear your best clothes.
C. Bring detailed handouts.
D. Know your material thoroughly.
Critics thought that Keiko would （）
A. die from the cold water in Iceland
B. be happy to return home
C. want to be free
D. be less active
Which of the following parts of the body does not have physical problems caused by stress（）
A. the arms
B. the stomach
C. the lungs
D. the heart
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