单项选择题

His inability to learn foreign languages was a(n) obstacle to his career.()

A．barrier
B．excess
C．carrier
D．impulse

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单项选择题
In the deserted factory several huge machines were left to rust and decay.()

A．inaugurate
B．disintegrate
C．accelerate
D．disseminate
单项选择题
The Austrian manufacturing industry consists of a few large organizations, many of which operate under government auspices.()

A．supervision
B．orientation
C．regulation
D．sponsorship
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