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Professor Peterson had just stepped into the classroom and that was when he discovered that several lab manuals were missing.

发布日期:2021-03-23

Professor Peterson had just stepped into the class...
A

and that was when he found out

B

and then he discovered

C

when he discovered

D

after which he discovered

E

discovering soon thereafter

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此试题出现在

国外英语考试

美国学术能力评估考试(SAT)

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