用括号中所给词的适当形式填空。

1. Where _____ his black shoes? ( be )

2. Look! The light is red. You mustn't ______ (cross) the street.

3. There are four classes on the _____ floor. ( one )

4. Jim enjoys _______ (chat) with friends on the phone.

5. Would you like _______ (visit) the museum with me?