根据短文内容及首字母提示补全单词，使短文完整、通顺

    What do you think life will be like in the future? I don't think we will have to do some unpleasant housework at home because r____ can help us. For example, they will help us c____. The food they cook will be healthier and more delicious. We will f____ in love with such food. Then we will s____ more time reading books which can make sound. We will only need to ____ to them.

    A new ____ of clothes will be made. They will be warm in winter and cool in summer. We can fly freely in s____ like an astronaut to any planet in this kind of clothes. R____ will probably become very common transportation.

    S____ are making science develop faster and faster. They predict that our life will be better and better. I believe the prediction will come ____ soon.

两条直线相交，如果其中一个角是直角，那么其它三个角都是____角，这两条直线____．