题目

听对话，回答问题。 （1） What was Jane doing when the lights went out? A . Doing the shopping. B . Going to sleep. C . Watching a match. （2） How did Jane's parents come back from New York? A . By Car. B . By air. C . By train. 答案：B C16．计算：（1）（-7）-（+5）+（-4）-（-10）（2）-0.5-（-3$\frac{1}{4}$）+2.75-（+7$\frac{1}{2}$）（3）-14-（1-0.5）×$\frac{1}{3}$×[2-（-32）]．