Sure! Here are the corrections and rewrites for the given sentences:

### IV. Correct a mistake
1. How much flour should I use to make these pancakes?
2. She bought half a kilo of beef on the way home from work and we made some steak for dinner.
3. How many meals do people in your city have a day?
4. Could you find any organic food in the supermarket near our house?
5. This morning I didn't have a cup of coffee as usual.
6. In my country there are more than 200 kinds of cakes with various shapes and tastes.
7. If you put too much pepper into the sauce, it will be too spicy for the kids.
8. You may not know, but in the US breakfast is often the biggest meal of the day.

### V. Rewrite the following sentences
1. It is more pleasant to go to a concert than to go to the circus. → It isn't as pleasant to go to the circus as to a concert.
2. The Amazon isn't as long as the Nile. → The Amazon is shorter than the Nile.
3. You should put the onions into water when peeling them. → Why should you put the onions into water when peeling them?
4. Is this the only way to keep the dish warm? → Isn't there another way to keep the dish warm?
5. My sister likes orange juice most. → Orange juice is my sister's favorite.
6. Nick dislikes beefsteak and his brother does, too. → Nick doesn't like beefsteak, and neither does his brother.
7. Garcia last wrote to me six months ago. → Garcia hasn't written to me for six months.
8. What do you think of this Mexican dish? → How do you feel about this Mexican dish?
9. Anna is intelligent and she is hardworking. → Anna is not only intelligent but also hardworking.
10. Mary didn't go to school yesterday because of her sickness. → Because Mary was sick, she didn't go to school yesterday.