单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage; you will be given 20 seconds to answer the questions. Now, listen to the passage.
According to the speaker, what can be inferred about genealogical research

A．It is very difficult, so only professionals can get reliable results.
B．The findings can never be trusted because the data is not reliable.
C．It can be useful for police investigations.
D．Some people do it for fun.
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单项选择题
What does the woman want the man to do
A．Explain his technique.
B．Program her computer.
C．Help her with her homework.
D．Join a tutorial.
问答题
Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given 2 minutes to check through your work once more.
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