There is a mistake in each sentence ??
1- Asteroids may be fragments of a planet shattered long ago or from material the nuclei of old comets
2- the first native Americans to occupy what is now the southwestern united states were the big-game hunters ,which appeared about 10000 b.c
3- some hangers ,buildings used to hold large aircraft ,are very tall rain occasionally falls from clouds that for along the ceilings
4- most sand dunes are always in motion as wind pushes sand upward one side of each dune ,over the top ,and down the other side

Question

There is a mistake in each sentence ??
1- Asteroids may be fragments of a planet shattered long ago or from material the nuclei of old comets 
2- the first native Americans to occupy what is now the southwestern united states were the big-game hunters ,which appeared about 10000 b.c 
3- some hangers ,buildings used to hold large aircraft ,are very tall rain occasionally falls from clouds that for along the ceilings 
4- most sand dunes are always in motion as wind pushes sand upward one side of each dune ,over the top ,and down the other side

Answer

1- from material --> of material 
2- Which --> Who 
3- very --> So
4- upward --> up

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