单选题
1.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
正确答案:C
答案解析: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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