Shanghai is one of the largest cities in the world that______large populations each over ten million.
A. has
B. have
C. had
D. are
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When I try to understand______that prevents so many Americans from being as happy as might
A. why it does
B. what it does
C. what it is
D. why it is
You are traveling in Beijing. You are not satisfied with the service in a park and write a
What does the author intend to say by the last paragraph?
A. To tell us why car renting is so popular now.
B. To tell us the promising future of car-sharing.
C. To tell us the huge cost of keeping a private car.
D. To tell us the current situation of U. S. car market.
The main barrier for the quick development of car-sharing is______.
A. the high cost of rental and duration
B. the reliability of car-sharing firms
C. the reliability of car renters
D. the attitude of car-owners