单选题_You seem a little blue today. What's the matter—_____________________.选项：

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广东开放大学 2023年春季招生简章

单选题_You seem a little blue today. What's the matter?—_____________________.选项：

A.I am a little sad.

B."It doesn't matter."

C."It's been a difficult day.

参考答案：C

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