Scientists are racing________time in order to find a cure for bird flu.[ ]A．

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Scientists are racing________time in order to find a cure for bird flu.[     ]
A．along with
B．against
C．around
D．ahead of

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举一反三

—Listen,there is some strange noise.This machine must be________.
—I think so.You must have it checked.[     ]
A. out of order
B. out of date
C. out of sight
D. out of control

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She got so angry that she ran after them.She was soon________，but she continued to run.[     ]
A. out of sight
B. out of breath
C. in sight
D. in breath

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I went along thinking of nothing________, only looking at things around me.[     ]
A. in particular
B. in harmony
C. in doubt
D. in brief

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________, I lost heart in English learning, but my teacher often said to me, “Keep on working hard;  you’ll succeed________.”[     ]
A. At a time;  in time
B. At a time;  on time
C. At one time;  in time
D. At one time;  on time

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We’ll have a sports meet for the next three days.________, we won’t have lessons for three days.[     ]
A. In other words
B. On the other hand
C. For one thing
D. As a matter of fact

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