单项选择题

Which of the following measures can help you sleep better

A．Staying up late.
B．Taking a hot bath.
C．Having late meals.
D．Traveling between time zones.
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单项选择题
From the passage we can conclude that the US has come to realize ______.
A．the weakening of the US dollar can result in trade deficits
B．the lower the retail prices, the greater the profits
C．tourism can make great contributions to its economy
D．visitors to the US are the wealthiest in the world
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From what the Brazilian biologist says, we know that tourists like her ______.
A．are reluctant to carry cash with them
B．simply don't care how much they spend
C．are not good at planning their expenditure
D．often spend more money than they can afford
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