1. Vietnamese has the population of 90 million people.
=>Vietnam has the population of 90 million people.
2. Many people believe there are a lots of unique creatures under the sea.
=>Many people believe there are a lot of unique creatures under the sea.
3. Today it’s hoter than yesterday.
=>Today is hoter than yesterday.
4. She speaks English very good.
=>She speaks English very well.
5. A number of students in this class is forty.
=>A number of students in this class are forty.