According to paragraph 7, why has the underclass emerged？
A．The new term was necessary because the lower class enjoyed a higher lifestyle. than it had previously.
B．The increase in crime has supported a new class of people who live by engaging in illegal activities.
C．Changes in the economy have caused an entire class of people to survive by welfare or crime.
D．Minimum-wage jobs no longer support a class of people at a standard level in the economic system.

You are late for work again, Miss Jane. You ___ here half an hour earlier.
A．must be
B．could have been
C．may have been
D．should have been

听力原文：If you are asking for someone to translate this document, I think the new secretary, who is bilingual, can do the job hand over fist.
（23)
A．No one in this office is willing to do the translation except yourself.
B．The new secretary will ask someone to fix the date for you.
C．The new secretary can type and hand in the document for you.
D．The secretary is an able person to help you with the translation.

Listen again to part of the lecture. Then answer the question. What does the professor imply about the effects of the media on society？
A．The media did not affect society before the twentieth century.
B．Television has a mostly negative effect on human behavior.
C．The media's effects are of widespread interest and concern.
D．The Internet will be the most influential medium in the future.

Which of the following are examples of the marketing function of harvesting？ Click on two answers.
A．picking cotton
B．Sorting eggs by size
C．Moving corn to a grain elevator
D．Milking cows

The main purpose of this plan was to ______.
A．cut down the gas supply
B．eliminate the long lines at gas stations
C．result in the recent oil crisis
D．buy gas only in odd-numbers or even-numbers