Froggie was a frog who never remembered where he had been.His biggest dream was to find the best pond to 1 in freely without worrying about water snakes，which were his natural enemies.One day，Froggie hopped(跳) to a kitchen and jumped into a pot full of hot water.Froggie felt the burning heat 2 hurried out of the water as fast as his legs could carry him."I almost 3 there!"Froggie thought.
A few days later，Froggie 4 back to the same kitchen，completely forgetting he had been there.He again hopped into the same pot.This time，the water inside was 5 .He 6 and thought，"There's no water snake trying to eat me and I can have this place all to myself ! "At that moment，Froggie knew it was his 7 pond. What he didn't know was that the water was warming up over a low heat.
After thirty 8 of swimming，Froggie felt the water was warmer but he regarded this as a nice surprise."This sure is the best place for swimming.I get to have a hot bath，too." 9 his comfortable bath，the water kept getting warmer and warmer.Froggie was so comfortable that he fell asleep.And he 10 woke up.
From Froggie's story，we can learn that people are blind to problems that slowly get worse over time.
