Someone I want to verify pls help

a) The dog has a small patch on its leg.
b) There is too much salt in this soup.
c) Oil does not blend with water.
d) Consuming too much sugar can lead to health problems.
e) He has written a letter to his friend.
Explanation:
a.The dog has a small patch on its leg.
b.There is too much salt in this soup.
c Oil does not blend with water.
d. Eating too much sugar can lead to health problems.
e. He has written a letter to his friend.