单项选择题

The high-speed trains can have a major impact on ourlives（）

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

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单项选择题
The police believe the motive for the murder was jealousy.（）

A．choice
B．idea
C．decision
D．reason
单项选择题
Marsha confessed that she knew nothing of computer.（）

A．admitted
B．reported
C．hoped
D．answered
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