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 ______a nurse, she knew how to take care of a patient.
A.Been B.Being C.To be D.Be

答案
B
解析

核心考点
试题【 ______a nurse, she knew how to take care of a patient.A.Been B.Being C.To be D.】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三

The monkey was so lucky that it just missed ______ .
A.catching B.to be caught C.being caught D.to catch

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.Doctors and medical supplies         to the scene of the accident immediately it happened .
A.have rushed B.were rushed C.were rushing D.rushed

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Nobody could have guessed, in those days, the place in history that Martin Luther King, Jr ____.
A.was havingB.was to haveC.had hadD.Had

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—When will Mother come back?
—She _____ to be here by eight o’clock tonight.
A.is supposingB.supposedC.was supposedD.is supposed

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In the past few years, Chinese scientists ________ great success in the field of space flight.
A.achievedB.have achievedC.wonD.had won

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