问题描述：
| My brother is really ____. He often works in his office far into the night. |
| [ ] |
| A. open-minded B. hard-working C. self-confident D. warm-hearted |
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最佳答案：
| B |
最佳答案：
题目：My brother is really ____. He often works in his office far into the night. [ ]A. open-minded B. har
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