jack is polite and helpful.改为同义句jack is________ polite and helpful_______

jack is polite and helpful.改为同义句jack is___a_____ polite and helpful_____person__there aren't any boxes on the desk改为同义句there _____ _____boxes on the desk稍等，我没看到追问。there aren't any boxes on the desk改为同义句there _are___ _no____boxes on the desk欢迎下次问我问题~~~