If the surveyors （）yesterday, they would have finished the survey work.<br>A:did not interrupt<br>B:were not interrupted<br>C:had not interrupted<br>D:had not been interrupted

If the surveyors （）yesterday, they would have finished the survey work.
A:did not interrupt
B:were not interrupted
C:had not interrupted
D:had not been interrupted

出自：海船船员证

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