（）during the voyage any case or suspected case of plague，cholera，yellow fever，smallpox，typhus or relapsing fever?<br>A:Has there been<br>B:Have there been<br>C:Has there<br>D:Have there

（）during the voyage any case or suspected case of plague，cholera，yellow fever，smallpox，typhus or relapsing fever?
A:Has there been
B:Have there been
C:Has there
D:Have there

出自：海船船员证

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