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. What is the best title for this passage

A．Development of cancer research.
B．Childhood cancer and pollution.
C．Engine exhausts.
D．Pre-natal care.
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单项选择题
What was the result of the test
A．She passed it.
B．She failed it.
C．She missed it.
D．She gave it up.
单项选择题
Which statement is NOT true about the bike messengers in New York
A．Many of them could have been in jail before.
B．They don’t have to register.
C．Their social security numbers must be checked in order to be employed.
D．Their personal records are seldom checked.
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