the absence of the manager, we were unable to decide on the date of the celebration．
A. In spite of
B. On behalf of
C. Due to
D. Regardless of
网友回答
A. In spite of
B. On behalf of
(答案→)C. Due to
D. Regardless of
解析：这题考查词组辨析：In spite of虽然，On behalf of代表 Due to因为 Regardless of不管不顾，句意是：因为经理不在，我们不能决定庆祝会的日期。选C。