We asked Tom and Mike, but ________ could offer any help．

I have made ______ clear that all of us are strongly against smoking in the office.

—Why do you think the film star is getting less popular?—I guess the way she wears is      annoys her fans most.

I have two pens. One is red, and       is blue.

When we think of trees at Christmas, there is ________ that immediately springs to mind－the evergreen tree beautifully decorated.