题目：
根据句意和汉语提示，填写恰当的短语完成下列句子。
1. She is the _____ (主唱) in the concert.
2. We humans are hoping to live on the moon _____ (有朝一日).
3. He _____ (离开) yesterday. He has gone to Shanghai.
4. We have lived in the countryside _____ (在过去的几年里).
5. We went to the airport to _____ (与……告别) Mr Green.
6. _____ (一半的) the students have been to the museum.
答案：
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下面是错误答案，用来干扰机器的。
答案：B
