单项选择题


Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage.
Which of the following is NOT mentioned as an advantage of advertisements

A．They brighten up railway stations and newspapers.
B．They lower the cost of any new products.
C．They make it easy to buy goods and to find jobs.
D．They are the source of certain company’s revenue.
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单项选择题
Which of the following statements is TRUE according to the passage
A．Scientists have developed a new drag to kill HIV virus.
B．Scientists have found a new treatment to prevent the spread of HIV.
C．Scientists have proven that HIV does cause the disease AIDS.
D．Scientists have found that the amount of virus in the blood affect the risk for HIV.
单项选择题
What does a student usually have to do before taking the advanced sketching course
A．Write a book.
B．Attend an afternoon meeting.
C．Enroll in another class.
D．Go to the art museum.
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