The telephone rang when wedinner.A. hadB. haveC. are havingD. were having

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A. had
B. have
C. are having
(答案→)D. were having
解析：本题的含义为电话铃响的时候，我们正在吃饭，本题中的从句表示过去正在进行，使用过去进行时，结构为was或were+现在分词，故本题选D。