问题补充:
The old couple have been married for 50 years and neverwith each other
A. they had quarreled
B. they have quarreled
C. have they quarreled
D. had they quarreled
答案:
A. they had quarreled
B. they have quarreled
(答案→)C. have they quarreled
D. had they quarreled
解析:考查倒装句,否定词放在句首使用部分倒装。根据时态要前后保持一致,前半句是现在完成时态,后半句应该也是现在完成时态,never放在句首,使用部分倒装,所以选C。