Although I often send e-mails to Tom, I have never seen him _____________.
A．face to face B．in time C．at the moment D．hand in hand
The police asked him to _________what he had seen.
A．set about B．set down C．set up D．set out
The number of people in the party _____fifty, but a number of them ____ absent for different reasons.
A．were; was B．was; was
C．was; were D．were; were
He asked us ________ we saw the lost cat or not.
A．that B．what C．which D．whether
After the exam, my teacher told me that failure ____ the mother of success.
A．was B．is C．be D．been
They promised to develop a software package by the end of this year, ________ they might have.
A．however difficult B．how difficult
C．whatever difficulty D．what difficulty
