Question: have a walk and discover the walls covered with scenes of the ancient egyptian history.
Answer: --> Have a walk and discover the walls covered with scenes of the ancient Egyptian history.

Question: - it is not at all probable that anybody would create a writing-system to be used by a people already possessing one. only the new nation,the israelites, had no writing system of their own.
Answer: --> - It is not at all probable that anybody would create a writing-system to be used by a people already possessing one. Only the new nation,the Israelites, had no writing system of their own.

Question: yamazaki river – seeing the cherry blossoms in full bloom is a must if visiting nagoya in april.
Answer:
--> Yamazaki River – seeing the cherry blossoms in full bloom is a must if visiting Nagoya in April.