题目

Will you have a free evening tonight? ______, let’s have a dinner together. A. If not     B. Why not     C. If so      D. What’ more 答案：C（1）21.36÷0.8-12.9（2）15.4×103-1.54×30（3）29.61÷9.4×1.4（4）（16.2-0.54）÷1.8．