单项选择题
Questions 18 to 21 are based on the following monologue.
According to the weather report, what was the pollution index
- A．Very Good
B．Good
C．Fair
D．Poor
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How does Susan feel
A．Satisfied.
B．Happy.
C．Tired.
D．Discouraged. -
单项选择题
A．Then
B．But
C．Moreover
D．Still -
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What will be a possible threat to plants in the future
A．Storms and floods.
B．Disease and fire.
C．Less space for their growth.
D．Rapid increase of the animal population.
