General acceptance of 3-D films may prove hard to come by, as the experience of three decades ago indicated.

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问题 General acceptance of 3-D films may prove hard to come by, as the experience of three decades ago indicated.

选项 A、obtain
B、explain
C、understand
D、discern

答案A

解析 本题中,come by的意思是“来临,达到”。四个选项中,obtain的意思是“达到,得到”,如:He obtained a knowledge of Latin.(他学会了拉丁文)。explain的意思是“解释,说明”;understand的意思是“懂,了解”;discern的意思是“目睹,认识”。只有A项符合题意。
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