Men have traveled ever since they first appeared on the earth.
Long ago, they did not travel for pleasure but to find new places where their cattle could feed, or to from their enemies, or to find more favorable climates.
They traveled on foot. Their journeys were long, tiring, and often dangerous. They protected themselves with simple weapons（武器）, such as wooden sticks or stone clubs, and by lighting fires at night and, adove all, keeping together.
Very soon they discovered easier ways of traveling. They rode on the backs of their tame animals; they made boats out of tree trunks so as to travel across water.
Later they traveled, not for necessity, but for the joy and excitement of seeing and experiencing new things. This is still the main reason why we travel today.
Traveling, of course, has now become a highly-organized（有组织的）business. There are cars and splendid roads, express trains, huge ships and jet planes, all of which make traveling comfortable and safe.
1．What’s the title of the passage?（Pleases answer within 5 words.）
2．Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence.（Please answer within 5 words.）
3．Which sentence in the passage can be replaced by the following one?
men made tree trunks into boats so that they could sail on rivers.
4．Translate the underlined sentence in Paragraph 5 into Chinese.
5．How do men feel about traveling？（Please answer within 10 words.）