单项选择题

A．Because he was never afraid of anything.
B．Because he was protected by a special medium.
C．Because he had enough experience.
D．Because it was his job.
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单项选择题
A．The patient has no stress in her life.B．The patient suffers from stress in her work, life and finances.C．The patient is very busy and does not have enough time for sleep.D．The biggest problem with the patient is her lack of physical exercise.
A．The patient has no stress in her life.
B．The patient suffers from stress in her work, life and finances.
C．The patient is very busy and does not have enough time for sleep.
D．The biggest problem with the patient is her lack of physical exercise.
单项选择题
The principle discovery in this century shows _________.
A．man has overthrown Newton’’s laws of physics
B．man has solved a new set of gigantic puzzles
C．man has lost many scientific discoveries
D．man has given up some of the once accepted theories
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