填空题 I thought the technician was {{U}}to blame{{/U}} for the {{U}}blowing{{/U}} of the fuse, but I see now {{U}}how{{/U}} I {{U}}was{{/U}} mistaken. A. to blame B. blowing C. how D. was
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【正确答案】 1、C, 改how为that。    
【答案解析】[试题分析] 本题测试引导词。 [详细解答] 这里how后的句子应是see的宾语从句，故应用that作为引导词。