428. Cause of and Reason for
(a) Cause of
(X) What's the reason for a sandstorm?
(O) What's the cause of a sandstorm?
(b) Reason for
(X) You have a good cause of coming.
(O) You have a good reason for coming.
A "cause" is that which produces a result.
A "reason" is that which explains or justifies a result.
429. Scene and Scenery
(a) Scene
(X) The TV crew arrived at the scenery.
(O) The TV crew arrived at the scene.
(b) Scenery
(X) The scene in Cyprus is beautiful.
(O) The scenery in Cyprus is beautiful.
A "scene" refers to one particular place, while "scenery" refers to the general appearance of the country.
We don't use scenery in the plural.
430. Center and Middle
(a) Center
(X) Stand in the middle of the circle.
(O) Stand in the center of the circle.
(b) Middle
(X) He was in the center of the street.
(O) He was in the middle of the street.
"Center" is the point that is equidistant from the edge of a circle.
"Middle" is the area equidistant from two sides: middle of the road, middle of the room, middle of the page, etc.