问题
选择题
______ we were very tired, we kept on ______ until midnight. [ ]
A. Even though; working
B. Since; to work
C. Though; to work
D. Because; working
答案
答案：A
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______ we were very tired, we kept on ______ until midnight. [ ]
A. Even though; working
B. Since; to work
C. Though; to work
D. Because; working
答案：A