问题
选择题
I didn't go to the barbecue last night ______ I had something more important to do. [ ]
A. so
B. if
C. because
D. but
答案
答案：C
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I didn't go to the barbecue last night ______ I had something more important to do. [ ]
A. so
B. if
C. because
D. but
答案：C
