单项选择题

Passage 2
Questions 8 to 10 are based on the passage you have just heard.
[听力原文]8-10
Habiba keeps a record of new words and expressions in English. He usually writes them in a notebook. Then, later in the day, she asks, bet teacher about them. "Mrs. Thomas, these expressions are new to me. She’s blue today. What’s the matter You’re yellow A little white lie. She has a green thumb. Blue and yellow people with green thumbs White lie" After looking at the notebook, Mrs. Thomas says, "In everyday English, Habiba, blue sometimes means sad. Yellow means afraid. A person with a green thumb grows plants successfully. And a white lie is not a bad lie." "I don’t understand. Please give me an example." "For example, I offer you some cake. The truth is, you don’t like my cake. You don’t say that. Instead, you say, No, thanks. I’m not hungry. That’s a white lie." "I see. Thanks for the explanation."

According to the article, "She’s blue today" probably means（）.

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