But northern and southern leaders could not agree on which one to build first.

VOA: special.2009.05.28

University of Illinois Professor May Berenbaum says it appears that bees could deal with one or two viruses at the same time, but not three or four.

VOA: special.2009.09.22

But she said that was the one thing she could not do.

VOA: special.2009.02.22

They went to one man's home but could not find him there.

VOA: special.2009.09.07

I could not run. Soon,all but one of the creatures moved away.

VOA: special.2010.07.17