单项选择题


Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．Ozone as a form of oxygen.
B．Problems caused by the thinning of the ozone layer.
C．The origin of ozone problems.
D．The latest studies of ozone problems.
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填空题
Narita asked people to fill out a survey about ______ during the children’s first 16 years.
单项选择题
A．He works at the meat counter.B．He delivers groceries to customers.C．He serves as a cashier.D．He stocks shelves.
A．He works at the meat counter.
B．He delivers groceries to customers.
C．He serves as a cashier.
D．He stocks shelves.
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