Correct the mistakes in these sentences. There may be more than one.

1. Blueberries can improve short-time memory. term
2. Many fruits are a good sauce of vitamin C and provide major health benefits.
    
3. Oily fishes should form part of a healthy diet.
    
4. Which do you prefer to eat as a snack if you’re hungry, fruits or nuts?
    
5. A: There’s a new Chinese restaurant in town. B: Good! I love Chinese foods.
    
6. There has been a sharp rise in the number of people suffering from depresion.