根据短文内容判断下列句子正(√)误(×)。
Hello, I'm Sara. I'm 12 years old. Look! This is my bag. I have twenty pencils in it. I have thirty erasers. I have fifty rulers. I have forty markers. I have ten books. What do you have? Can you tell me?
( ) 1. Sara is twelve years old.
( ) 2. Sara has ten pencils.
( ) 3. Sara has thirty erasers.
( ) 4. Sara has forty markers.