【题目】I had just got up and was about to cook my breakfast______ the telephone rang loudly.
A. whileB. whenC. asD. before
在线课程【答案】B
【解析】
考查连词辨析。句意：我刚起床正要做早饭，这时电话铃响了。A. while尽管；B. when正在那时；C. as当.......时D. before在......之前。be about to do...... when......“正在做某事......正在那时......”为固定句型。故B选项正确。