Doctors and nurses work ________to save lives. [ ]A. hand in hand

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Doctors and nurses work ________to save lives.    [     ]
A. hand in hand
B. face to face
C. step by step
D. all the above

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举一反三

I always put my mobile phone__________.      [     ]
A. in hand
B. at hand
C. by hand
D. out of hand

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I don"t find my luggage. Maybe someone has taken it__________.      [     ]
A. by chance
B. on purpose
C. by error
D. by mistake

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Some people act regardless __________ what will happen afterwards.     [     ]
A.of
B. with
C. as
D. for

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Tim continued to run away, _________ our shouts to him that he should return.     [     ]
A. as regards
B. with regard to
C. regardless of
D. regarding

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_________the original failure of his experiment,he still decided to continue his research.     [     ]
A. Regardless of
B. Even though
C. As well as
D. Besides

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