学进去

    _____ is a good and popular sport. People _____ swimming because the water _____ them feel cool. But if they swim in the wrong place, it can be very dangerous. _____ lots of accidents every year, and most of the victims are students. Summer holiday is coming again. I want to give you some advice. Firstly, don’t get into the water when you are alone. Secondly, don’t go swimming if there is a “No swimming” sign. Thirdly, be _____ in water. If you remember these, swimming will be safe.