What may be the oldest fossil footprint yet found was discovered in June 1968 by William J. Meister, a non-professional fossil c

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问题 What may be the oldest fossil footprint yet found was discovered in June 1968 by William J. Meister, a non-professional fossil collector.

选项 A、a part-time
B、a spare-time
C、an untrained
D、an amateur

答案D

解析 形容词辨析。A.a part-time部分时间的,非全日的,兼职、兼任的;B.a spare—time;C.an untrained未经训练的;D.an amateur业余爱好者;而non-professional非专业的,非职业的,因此D是答案。
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