Answer:
You say there is one twin. Twins, when referred to as a set, require an s, just like most other groups of objects. There are the twins.
Differences: Earth is 8 times as dense as Saturn. Saturn has more mass than Earth. Saturn is 9 times bigger than Earth. Earth takes 24 hours to complete a day, while Saturn takes 10 hours and 32 minutes. A year on Earth is, well, 1 year, while a year on Saturn lasts 30 years.
Similarities: Earth and Saturn have the similar gravity.
Build a sentence with a predicate nominal predicativ name being placed after the verb copulativ, and a sentence with a predicate nominative manner in which name (s) predicativ to be placed before the verb copulativ
