—Which do you prefer，a CD player or a Walkman？
—________．I prefer a portable computer．
A．Both
B．Either
C．None
D．Neither
I can’t play the piano，and________．
A．neither can my sister
B．my sister can’t，too
C．so can’t my sister
D．can my sister，either
She’s not strong enough________walking up mountains．
A．to go
B．going
C．go
D．went
—Could I borrow your camera？
—________，but please give it back by Saturday．
A．I am sorry
B．Of course
C．Certainly not
D．No，thanks
—Sir，could you please put out your cigarette？This is a smoke-free(无烟的)school．
—________．
A．I’m sorry about this．
B．Not at all．
C．Sure．I’d love to．
D．Never mind．
The classroom is very dirty．Please clean________．
A．it up
B．up it
C．them up
D．up them
