题目内容
根据汉语提示补全下列句子
1. Chosen to speak at the opening ceremony,he (一直在熬夜) preparing his speech.
1. has been staying up late

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题目内容
根据汉语提示补全下列句子
1. Chosen to speak at the opening ceremony,he (一直在熬夜) preparing his speech.
1. has been staying up late