As the world’s population continues to grow, the ______ of food becomes more and more of a concern.
In ______1600’s, Shakespeare made use of _______wider vocabulary than ever before .
He is a _______visitor to that country. I mean, he often goes there.
They became good friends during the war, and since then their lifelong friendship has______ tests of life and death.
Since Margot found it difficult to settle in a new place, she felt ______ that the family had to move.
The engine of the ship was out of order and the bad weather ______ the helplessness of the crew at sea.