单项选择题

Which of the following does NOT give the sellers conveniences or advantages

A．Electronic cash registers.
B．Electronic recorders.
C．Credit cards.
D．Computers.
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单项选择题
What is the most difficult part in the issue of illegal immigration, according to the passage you have just heard
A．Legalizing all immigration, whether it is legal or illegal.
B．Dealing with the legal and illegal immigrations respectively.
C．Building a long fence along the long border near Mexico.
D．Making the legal immigration easier and more common.
单项选择题
What is suggested for the issue of illegal immigration discussed in the passage just heard
A．Stationing a huge army along the border preventing illegal immigration.
B．Opposing the illegal immigration but not the legal immigration.
C．Facilitating the legal immigration in the healthy manner possible.
D．Comparing the similarities between the past and the present immigrations.
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