Are the underlined words correctly used in the sentences?

Are the underlined words correctly used in the sentences?

1. Your works have left me speechless.
2. The host of the program awarded a certificate of appreciation to the guest of honor, who in turn thanked the organizer of the event.
3. Marc's school campus has not yet been fully furnished. Structures such as the gymnasium and swimming pool will be added later on.
4. Children joined a colorful parade with floats depicting significant historical events concerning their home city.
5. European bands provided the lively music for the parade.