We shall go to help them_______we are free.
The faces of four famous American presidents on Mount Rushmore can be seen from a ________of 60 miles.
It is reported that a man ________off an old lady in the street yesterday.
I'll trade you my stamp collection _______your model boat.
Their faces ______after the long-term misunderstandings were________.
(2012年湖北八市高三联考,29)We welcome rain,but a(n)________large amount of rainfall will cause floods.