题目内容：
8. I didn’t realize he was a famous film star ______ he took off his dark glasses.(本题3.0分)A、 when
B、 until
C、 unless
D、 once
参考答案：
选择题：8. I didn’t realize he was a famous film star ____
- 题目分类：河套学院-大学英语
- 题目类型：选择题
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A、 when
B、 until
C、 unless
D、 once