The old couple have been married for 40 years and never once with each
Other.
A. they had quarreled
B. they have quarreled
C. have they quarreled
D. had they quarreled
网友回答
A. they had quarreled
B. they have quarreled
(答案→)C. have they quarreled
D. had they quarreled
解析：考查部分倒装句。本句中的否定词never放在后面的句首，后面使用部分倒装的形式。根据前面的for 40 years说明使用现在完成时。句意：那对老夫妻已经结婚40年了，从来都没有争吵过。故C正确。