The old couple have been married for 40 years and never once with each other.
A. they had quarrelled
B. they have quarrelled
C. have they quarrelled
D. had they quarreled
网友回答
A. they had quarrelled
B. they have quarrelled
(答案→)C. have they quarrelled
D. had they quarreled
解析：
C。由否定意义的词never once开头，句子用部分倒装；前一并列分句已经提示要用现在完成时态。