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

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

选项 A、barrier
B、excess
C、carrier
D、impulse

答案A

解析 本题中,obstacle的意思是“障碍,妨害物”。四个选项中,barrier的意思是“障碍”,如:The police put a barrier across the road.(警察设了路障)。excess的意思是“过度,超过”;carrier的意思是“运送者,搬运器”;impulse的意思是“推动,刺激”。只有A符合题意。
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