单项选择题

Passage Three Questions 17 to 20 are based on the passage you have just heard.

A．Because they have more money.
B．Because today’s lifestyles are more flexible.
C．Because people are more open to new things.
D．Because the US society has changed dramatically.

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热门试题

单项选择题

Which of the following is closest in meaning to the word “diet” (Paragraph 4)

A．“food”
B．“rice”
C．“animals”
D．“agriculture”

问答题

But balloons and the cigar-shaped airship, which was invented slightly later, did not solve the problem of flying because they had no means of power or control.