---Shall I use your red ink? ---It is a pity that it_____. I will get some.
It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
Barack Obama told millions ______ him that his grandmother's influence on ______ he is and the way he views the world was significant.
There is no ________ thinking more about the matter. Take it easy.
It's reported that by the end of this week the stock exchange________ by about 10%.
Careful surveys have indicated that audience ________ teachers and students be more likely to take seats ________ directed.