单项选择题

A．He has finished the paper.
B．He put his paper somewhere else.
C．He forgot to begin researching his paper.
D．He postponed the research.
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填空题
Tiger sharks can ______ when other things are around them because they have ______.
单项选择题
A．Some brave teachers ran secret night schools.B．Teachers who were found educating black children were forced to leave town.C．The first African Free School was opened in New York City.D．Several African free schools began receiving public funding.
A．Some brave teachers ran secret night schools.
B．Teachers who were found educating black children were forced to leave town.
C．The first African Free School was opened in New York City.
D．Several African free schools began receiving public funding.
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