The plane took off again__________
A. as soon as it had arrived
B. after all the passengers were woken up
C. while the passengers were sleeping
D. early the next morning
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"Nostalgia" in the 3rd paragraph most probably means_________
A. being conservative
B. being keen on saving money
C. being fond of things new
D. being fond of things of the remote past
请选择（12）处的最佳答案．
A. growing
B. increased
C. reduced
D. disappeared
请选择（13）处的最佳答案．
A. deal
B. bargain
C. surprise
D. people
Desert perennials lose their leaves after the rainy season just as trees lose theirs in wetter climates before winter arrives, but the reasons for this feature are different.
A. True
B. False
C. Not mentioned
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