It some time I realized the truth.A. was; beforeB. is; beforeC. has been; untilD. has be

发布时间：2020-08-17 01:13:36

It      some time      I realized the truth.
A. was; before
B. is; before
C. has been; until
D. has been; after

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(答案→)A. was; before
B. is; before
C. has been; until
D. has been; after
解析：考查固定句型：It was+一段时间+before…，要多久…就（才）…，句意：过了一段时间我才意识到真相。选A。
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