I had just got up and was about to cook my breakfast ________ the telephone rang loudly, but it hung up ________ I could answer it．A.while; whenB.when; asC.as; afterD.when; before
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D解析第一个空用when作并列连词，意为“正在那时或这时”，前面常与had done/was doing/was about to do连用；第二个空用before。表示“我还没来得及接，电话就挂断了”。