单项选择题

A．though
B．as
C．so
D．if
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单项选择题
The tradition of hospitality to strangers______
A．tends to be superficial and artificial
B．is generally well kept up in the United States
C．is always understood properly
D．has something to do with the busy tourist trails
单项选择题
The word superficial (Para. 4 Line 6) might mean______
A．thorough and profound
B．more than is needed
C．on the surface only
D．contemptuously indifferent
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