单项选择题

Physicists have made new discoveries that challenge our（）theories of the universe.

A. existed
B. adapted
C. accepted
D. established

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单项选择题
（42）（）

A. power
B. strength
C. force
D. might
单项选择题
Am I to understand that his new post（）no responsibility with it at all

A. keeps
B. supports
C. carries
D. possesses
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