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We cannot feel speed.But our senses let us know that we are moving.We see things moving past us and feel that we are being shaken.We can feel acceleration，an increase in speed.But we notice it for only a short time.For instance，we feel it during the take-off run of an airplane.We feel the plane’s acceleration，because our bodies do not gain speed as fast as the plane does.It seems that something is pushing us back against the seat.Actually，our bodies are trying to stay in the same place，while the plane is carrying us forward.
Soon the plane reaches a steady speed.Then，because there is no longer any change in the speed，the feeling of forward motion stops.

Many years ago when the summers seemed longer and life was less complicated，we had rented a cottage 【26】______a river in the heart of the country 【27】______the whole family was going to 【28】______a three-week holiday.There were four of us：me，Mum and Dad，and Mum’s sister，Auntie June.Oh，and I mustn’t forget to 【29】______.Spot，our little dog.I was 【30】______to go off by myself all day，【31】______I promised to be careful and took Spot with me for 【32】______.
One day I was out fishing with Spot when we heard a lot of shouting in the 【33】______followed by a scream and splash.I was a bit 【34】______so I called Spot and we both hid 【35】______a bush where we could see but not be 【36】______.After a few moments，a straw hat came drifting down the river，followed by an oar，a picnic basket and 【37】______oar.Then came the rowing boat itself，but it was 【38】______upside down!A few seconds later my dad and Auntie June came running 【39】______the river bank，both wet 【40】______.Spot started barking so I came out of hiding and said hello.My dad got really angry 【41】______me for not trying to catch the boat as it went past.Luckily，【42】______，the boat and both the oars had been caught by an overhanging tree a little further downstream，but not the hat or picnic basket.So I had to let them 【43】______my sandwiches.Dad and Auntie June both made me 【44】______not to tell Mum what had happened 【45】______she would be worried.