Pythons，which come from Asia and Africa，are among the longest snakes in the world.They can grow to be more than six meters long--longer than a large pickup truck.Their bodies can be as thick as a telephone pole（桿）.Pythons' mouths can stretch（伸展） so widely that they can eat animals as large as deer and alligators（短吻鱷）.
   Surprisingly，baby pythons are popular pets in America.But pythons grow quickly.In a year，a tiny baby can become two meters long.As time passes，it grows even bigger.Many owners have trouble caring for such large and dangerous animals.Sometimes，they take their snake and leave it in the wild.
   In most areas of the United States，pythons wouldn't have enough warmth or water to survive.Places like southern Florida，though，have a perfect climate for pythons.Because of this，pythons are causing serious trouble in Florida's Everglades National Park.
   Scientists are not sure how many pythons there are in the Everglades ，but they guess that there are thousands.The big snakes eat the animals that make their natural home in the park.Pythons have also eaten the pets of people who live in the area.
   Park officials are trying to solve this big problem.They are using different ways to catch pythons.They have using radio transmitters （無線電廣播發(fā)射機(jī)） to caught them.And they have even trained a dog to help.

as thick as a telephone pole	more than six meters long	Pythons	（1） growth growth	from a tiny baby to a （1） two-meter-long two-meter-long snake in a year
	appearance
				even bigger with time passing
			（2） trouble trouble	eat（5） animals and pets animals and pets
	（3） wide mouths wide mouths
				without enough warmth or water to survive