单项选择题
A. Colds are always very dangerous. B. Colds are often unpleasant though not dangerous. C. Actually nothing can help get rid of colds faster. D. The best way to keep colds away is to be strong and healthy.
A. can keep herself better hidden from the male bird B. can sit on the eggs and hatch them easily C. can protect other female birds in the woods D. can keep herself safe from danger
A. where the people had to go B. what the people had to eat C. how the people left D. why people had to leave