用所给单词的适当形式填空。

1. This is an interesting book _____ (write) by Shakespeare.

2. Gina was my best friend when l was a kid, but _____(not see)her since

2002.    

3. －How long have you been _____ (study) English?

    －For five years.    

4. The twins _____ never _____ (play) computer before, so they are so

excited.    

5. －How long _____she _____(live)in Shanghai?

    －Since the end of last year.