In order to be successful as an engineer, she had to become______at mathematics.

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问题 In order to be successful as an engineer, she had to become______at mathematics.

选项 A、proficient
B、outstanding
C、prominent
D、experienced

答案A

解析 be proficient at精通…。outstanding杰出的。prominent突出的,著名的。experienced有经验的。根据常识,作为工程师需要精通数学,并不一定要在数学领域成为杰出或著名的人才。
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