问题
选择题
_____ you call me to say you're not attending my birthday party, I'll see you at it. [ ]
A. Whether
B. Though
C. Until
D. Unless
答案
答案：D
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_____ you call me to say you're not attending my birthday party, I'll see you at it. [ ]
A. Whether
B. Though
C. Until
D. Unless
答案：D