【C20】
A. under
B. beyond
C. within
D. without
【C14】
A. Therefore
B. Otherwise
C. But
D. And
A．He had various political experiences.B．He preferred civilian clothes to uniform.C．He
A. He had various political experiences.
B. He preferred civilian clothes to uniform.
C. He was tall and handsome.
D. He was gentle and careful.
What do we learn about Pops from the passage？
A. They pose a threat to marine life and humans.
B. They are substances that are easily degraded.
C. They can be found only in the polar region.
D. They will decrease in number if moving in the air.
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