选词填空：
People fastest move Cheetahs 112km without seconds Sharks per sailfish animals 109km
1.can.very fast in cars or boats,but.can move very fast on land or in the water.machines.
2．The.people can run l00 min 9.78..3．.are the best runners .They can run.per hour.
4．.can swim 39 km.hour.
5．The.can swim.per hour .