all summer in a day

All Summer in a Day is a Suspense and Science Fiction story

SUSPENSE
 "Behind the closet door was only silence."
This is a suspense sentence because you don't know what Margot is doing behind the closet.

"They stood in the doorway of the underground for a moment until it was raining hard. Then they closed the door and heard the gigantic sound of the rain falling in tons and avalanches,everywhere and forever."
This is a suspense sentence because it just makes the reader pause for a moment. The mind of the reader would be like rain splashing on the ground immediately. It was rain again in Venus it was a small gap of ran after 7 long years of rain on the planet. 

SCI-FI
"And this was the way life was forever on the planet Venus"
 It is impossible and totally unrealistic to live in Venus.
"It had been raining for seven years"
This is science fiction because it is technically impossible to rein for 7 years on earth.