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
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
C
本题考查的是倒装结构的用法。第二分句中因有否定副词 never 提前，故应用倒装结构;第一分句中的 have been married 已限定了时态，据此可排除 D 项。
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