单选题The old man soaked his hands in the cold water and __ to keep his head clear.
单选题The central purpose of management is __ every action or decision help achieve a carefully chosen goal.
单选题If President Jackson ______ of a paper, he would write “all correct” on it.
单选题It can be interred from the passage that George Washington and John Adams both
单选题Green ___ have the power to make food from substances found in the air and soil.
单选题It's time __ you __ relax.
单选题__ to completely cut off its oil supply, it would badly damage its own economy.
单选题Alice __ my letter; otherwise she would have replied before now.
单选题He speaks English, but not __ his sister does.
单选题Unfortunately war __ in the Middle East on October 6, 1973.
单选题It's very nice __ you to help me.
单选题Because of my poor English, I’m afraid I can’t make myself
单选题We hire and ______ people mainly for their ability to do business.
单选题Some people wait for__ to come knocking. Some people sought it out.
单选题Between 1890 and 1970 the monetary costs of supplying energy _____ more or less constant or declined.
单选题The U.S., generally acknowledged to be a step __ Britain on biofuel, has an estimated 600 stations that offer E85 (a fuel made of 85 percent bioethanol).
单选题Those __ have six or more close friends are likely to describe themselves as "very happy".
单选题The statement that oil originated in the sea is __ by a glance at a map showing the chief oilfield of theworld.
单选题The author really started on his way to become a writer.
单选题As life is full of strife and __, we need friends to support and help us out of difficulties.