Between the lectures is a 20 minutes’break,__________the students can get relaxed.
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.
(2013•天津卷)While she was in Paris,she developed a________ for fine art.