I delayed _______ your letter because I had been away for a week.
| A．answer | B．answering | C．writing | D．to post |
Several of the passengers were hurt and one was taken to hospital.Luckily ________ was killed.
| A．no one | B．not all |
| C．none | D．no other |
—Shall I attend my friend's comingofage ceremony, Mum?
—No, unless you see to ________ that you will be home before 10：00 P．M.
| A．one | B．this | C．it | D．her |
Before selecting the curtain for your newly decorated house, it's important to know what colors look great ________ the wallpaper.
| A．on | B．with | C．in | D．against |
—What are you two whispering about over there?
—Oh, ________.Just small talk.
| A．no | B．nobody | C．none | D．nothing |
Frankly speaking, ________ of them knew what the other was doing that morning.
| A．none | B．neither | C．some | D．all |