单项选择题

Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now, listen to the conversation. 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.

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Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation. Why is blinking important 您的浏览器不支持 audio 元素。

Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
Now, listen to the conversation. Why is blinking important