Помогите пожалуйста No sooner ... (to enter) the room than a

Помогите пожалуйста
No sooner ... (to enter) the room than a young man ... (to come) up to me with a glass of champagne (to be) sure it (to be) the first time I ... (to see) him in my life and I ... (not \ to know) his name but half an hour later (still \ to ask) me questions about my relatives and (to tell) me something about his new business.