用be动词的正确形式填空。

1.I________a boy. Li Lei________a boy, too.

2. —What________your phone number?

    —It________905-7447.

3. --Excuse me.________you Mark Brown?

    Yes, I________Mark Brown.

4. —Excuse me, Jenny.________that your pencil case?

    —No, it________not. It________his pencil case.

5. —Jack________in China.

    —Yes, Jim and Kate________in China, too.