Some insects_______ the colour of their surrounding to protect themselves.

The question that puzzled them is ____ they can get rid of the air pollution in the area.

te the old town is the 5500 meters YulongXueshan Mountain, its peak_______ with snow.

I forget where I saw the skirt, otherwise I _______ you the shop now.

Up to now, the program ______ thousands of children who would otherwise have died