单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will he given 20 seconds to answer the questions.
Now listen to the passage.
What will happen if a starfish loses an arm

A．It generates a new one.
B．It cannot swim.
C．It is easily caught.
D．It dies soon afterward.

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单项选择题

单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will he given 20 seconds to answer the questions. Now listen to the passage. What will happen if a starfish loses an arm 您的浏览器不支持 audio 元素。