阅读理解

       Lily is from New York , the U.S.A. She is twelve. She is in Shanghai NO.3 Junior High School. She

is in Class Eight, Grade One. Her phone number is 66786019. Dongdong is from Kunming. His English

name is Tom. He is eleven .He is in Class Seven,Grade One. His telephone number is 24524233. They

are not in the same class. They are good friends

阅读短文，选择正确的答案。

1. Lily is from    _____ . 

A. English                    

B. China                  

C. the U.S.A

2. Dongdong is in Class   ______ .

A. Six                      

B. Seven                  

C. Eight

3. Lily and Dongdong are good_________.  

A. students                  

B. friends                  

C. teachers

4. Where is Tom from ? He is from________

A. The U.S.A                

B. Japan                  

C. China

5. How old is Lily ?  She is ________

A. ten                      

B. eleven                  

C. twelve

若抛物线y=x²+2x+c的顶点在x轴上，则c= _________ ．