问题
单项选择题
A sailor on board（）from appendicitis and required operation immediately.
A.was suffering
B.is suffering
C.has suffered
D.has been suffering
答案
参考答案：A
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A sailor on board（）from appendicitis and required operation immediately.
A.was suffering
B.is suffering
C.has suffered
D.has been suffering
参考答案：A