完形填空. Swimming is very popular. People like 1 in summer because water makes people feel 2 . If  you like swimming but swim in a wrong place, it may be 3 . These years, a lot of people 4 when they were 5 themselves in the water, and most of them were students. Some people  are  not 6 in swimming. They often think they swim so well that 7 will happen to them in the water. Summer is here again. If you 8 swimming this summer, don't get into water when you are 9  . If  there is a  'No Swimming 'sign, still don't get into water. If you remember these, swimming 10 safe. Swimming is good for your health. (     )1.A.boating (     )2.A.hot (     )3.A.dangerous (     )4.A.dying (     )5.A.enjoying (     )6.A.careless (     )7.A.nothing (     )8.A.will go (     )9.A.alone (     )10.A.is B.running B.cool B.happy B.died B.enjoyed B.care B.anything B.go B.lonely B.be C.swimming C.cold C.safe C.dead C.helping C.careful C.everything C.goes C.safe C.will be D.skating D.warm D.danger D.death D.helped D.carefully D.something D.went D.danger D.will