单项选择题

According to the passage, inspectors paid an unexpected visit to the duty fireroom just______.

A．before the moon rose
B．after the moon set
C．after the sun set
D．before the sun rose
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单项选择题
Which of the following describes the main idea of the passage
A．Computers are stupid and inefficient.
B．Computer errors are basically human errors.
C．Computers can help department stores update the price list.
D．Supermarket price errors are often made through dishonesty.
单项选择题
According to the passage, which of the following statements is TRUE
A．That high-tech cash register is anything but an electric eye.
B．The grocery stores update the price list every other day.
C．There is no machine with intelligence today.
D．There are four biggest lies in America.
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