题目

There were moments ______ we had to slow down and give the situation a second thought. A . where B . why C . when D . that 答案：C计算下面各题，能简算的要简算． （4.2+4.2÷2.1）÷0.2 17÷[（1.2+0.5）×5] 0.9+99×0.9 8.59-4.1×0.1-4.59．