单项选择题

The high-speed trains can have a major impact on our lives.（）

A. effort
B. problem
C. concern
D. influence

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单项选择题
We have to act within the existing legal framework.（）

A. limit
B. procedure
C. status
D. system
单项选择题
She always finds fault with everything.（）

A. criticizes
B. simplifies
C. evaluates
D. examines
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