单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.
What did recent photographs from a space satellite indicate

A．The surface of the ocean is expanding.
B．Volcanic activity is increasing.
C．The surface of Earth contains tons of cosmic dust.
D．Thousands of comets are colliding with Earth’s atmosphere.

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单项选择题

What was Clarence Birdseye surprised to learn

A．A fish could survive being frozen.
B．The fish were easier to catch in the winter.
C．Food can be kept frozen indefinitely.
D．Solutions that freeze slowly form large crystals.

单项选择题

Who are being allowed to return home tonight

A．The evacuated residents.
B．Escambia County spokeswoman Sonya Smith.
C．People who fight hurricane.
D．People who fight tropical storm.

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. What did recent photographs from a space satellite indicate 您的浏览器不支持 audio 元素。

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.
What did recent photographs from a space satellite indicate