Having said goodbye to their friends, they _______ for home.
A. set about B. set up C set down D. set off
—Did the winner of the English Contest behave well?
—Really. She made a deep ________ on the judges.
A．idea B．feeling C．impression D．sense
It had been half an hour before she found herself _____ in the wrong direction of
her home.
A. walking B. to walk C. walked D. walk
His ability is beyond question; ______ has been in doubt is ______ he is prepared to work hard.
A. what; that B. what; whether C. which; whether D. that; that
Most people would agree that nuclear science should be developed to benefit the human beings_______ harm them.
A. more than B. other than C. better than D. rather than
Many new means__________ to prevent the river ____________.
A. have found, from polluting
B. have found, from being polluted
C. have been found, from being polluted
D. has been found, from being polluted
