中国大学MOOC: There are ________________ (a number）states in the United States.
举一反三
- There are _____ states in the United States.
- 中国大学MOOC: The universities in the United States have been attracting ______ number of international students.
- The Constitution of the United States of America is the Supreme law of the United States.
- 中国大学MOOC:"The United States of America consists of 50 states and a federal government.";
- There are 50 stars on the national flag of the United States. They represent today's 50 States of the United States.