--Do you know the right answer to the question?
--Sorry，I ________．Would you repeat that question?
[ ]
A．haven't listened
B．don't listen
C．wouldn't listen
D．wasn't listening
--Peter has finished his work.
-- ________, but I haven't.
It depends on ________ he has enough money.
Charles Babbage is generally considered ________ the first computer.
The factory ________ his mother works is in the east of the city.
________ of them knew about the plan because it was kept in a secret.
The pupil sat there, ________ what to do.
The boy likes playing football ________ basketball.
He ________ for twenty years.
He was in foreign countries_________.