单项选择题

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage. Why do cats sleep much more than horses

A．Because they need more time for restoration.
B．Because they are unlikely to be attackers.
C．Because they are more active than horses when they are awake.
D．Because they spend less time eating to get enough energy.

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单项选择题

Why is blinking important

A．It helps the eyes absorb eye drops.
B．It helps to keep the eyes moist.
C．It improves a person’s concentration.
D．It prevents a buildup of chemicals in the eyes.

单项选择题

How long does the training period last

A．Two to four months.
B．About three weeks.
C．At least half a year.
D．Two years or mor

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. Why do cats sleep much more than horses 您的浏览器不支持 audio 元素。

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage. Why do cats sleep much more than horses