单项选择题

Passage One Questions 26 to 29 are based on the passage you have just heard.

A．They extend their water pipes.
B．They give out faint cries.
C．They make noises to drive insects away.
D．They become as elastic as rubber bands.

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单项选择题

单项选择题

Passage One Questions 26 to 29 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。