Their experiment______, Tom and Mary set out to write the report on the results.

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问题 Their experiment______, Tom and Mary set out to write the report on the results.

选项 A、done
B、to be done
C、being done
D、will be done

答案A

解析 由常识可知,做完实验才能写报告。动词的过去分词短语表示完成。本句句意是:做完了试验,汤姆和玛丽开始根据实验结果写报告。
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