What is the main idea of this passage？
A. The possible danger of Christmas decoration.
B. Necessary information on safety regulations.
C. The accidents during Christmas season.
D. The nature of the household hazards at the end of the year.
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Why did Gregory Belenky restrict his subjects to odd numbers of sleep hours？
A. Because he could acquire more precise information.
Because he could provide different tests.
C. Because he could find out the utmost effects of sleep.
D. Because he could observe the relationship between sleep and cognition.
According to the rules in Thailand, troops can use______if protesters get within 100 feet.
A. rubber bullets
B. live ammo
C. tear gas
D. water gun
People arent suggested to go to Thailand recently because of its______.
A. social violence
B. military rebellion
C. family violence
D. political turmoil
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