I__________ you somewhere before, but your name has escaped me_________.
Mary worked here as a ____ secretary and ended up getting a full-time job with the company.
As the world’s population continues to grow, the ___of food becomes more and more of a concern.
—Pardon?Who will come?—________.
One way to understand thousands of new words is to gain ________ good knowledge of basic word formation.
Every possible means ________, but it seems that nothing will prevent the situation from getting worse.