. She _____ on this essay for twenty minutes but she has written only about a hundred words.
Professor Wang , _______ for his informative lectures, was warmly received by his students.
________evidence that language acquiring ability must be stimulated.
The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
My train arrive in New York at eight o'clock tonight. The plane I would like to take from there ______by then.
Many workers were organized to clear away remained of the World Trade Center.