问题
选择题
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
答案
答案：C
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。
