---- Putting on a happy face not only helps us make friends but also makes us feel better.----- .(2009.天津)
They have held three meetings this week _________.
The faces of four famous American presidents on Mount Rushmore can be seen from a _________ of 60 miles.
Hospital staff burst into cheers after doctors completed a 20hour operation to have _________ one-year-old twins at the head.
The environmentalists said wild goats’ __________ on the vast grasslands was a good indication of the better environment.
In dealing with public relations,we should make every effort to prevent the __________ in personality.