单项选择题


Questions 22 and 23 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
Now, listen to the news.
What is the news mainly about

A．An investigation about Iran.
B．An investigation about the U. S.
C．Iran’s national safety.
D．National defense of the U. S.
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单项选择题
Which of the following details about the river is CORRECT
A．600 kilometers of it are in critical condition.
B．30% of it is seriously polluted.
C．It provides 35% of China’ s total water resources.
D．35% of its major tributaries are in danger of pollution.
单项选择题
To buy better products, the speaker must ______.
A．read more advertisements
B．ignore advertisements
C．be clear of advertising techniques
D．be careful about those being advertised
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