My Dream House

    My name is Jane. I'm now living in a small house ____ my parents. Life for us is hard ____ happy. I must study hard ____ (buy) a big new house one day. I call ____ a dream house.

    My dream house is near the sea. It ____ (have) three floors with five ____ (bedrooms), three bathrooms, a big kitchen and two living rooms. ____ my friends come to visit ____ (I), I will have enough(足够的) bedrooms for them. We have a swimming pool behind the house and a garden in front of the house. In the morning, my parents can do some exercise in the garden to keep ____ (health). When we feel tired(劳累的). We can have a ____ in the swimming pool. Life will be easy for us.

如图，CD为△ABC外接圆的切线，AB的延长线交直线CD于点D，E、F分别为弦AB与弦AC上的点，且BC•AE=DC•AF，B、E、F、C四点共圆．

五(1)班有50人，在一次数学测验中，有1人不及格，求及格率．

How many  ?              

据《人民日报》报道，国家发展改革委员会、卫生部、财政部等六部委发布指导意见，明确针对城镇居民医保、新农合参保(合)人大病负担重的情况，引入市场机制，建立大病保险制度，避免因病致贫、因病返贫。
请结合材料，运用所学知识回答下列问题：