题目内容:
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
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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