—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
Our refrigerator is ________ again.We'd better buy a new one instead of repairing it.
A．in order B．by order
C．under order D．out of order
An artist who was recently traveling on a ferry to the southern island discovered ________ a long lost antique Greek vase.
A．at random B．by chance
C．in turn D．on occasion
