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单项选择题
A.officers
B.crew members
C.sailors
D.motorman
单项选择题
A.prohibit
B.prohibited
C.prohibiting
D.prohibits
单项选择题
A.hoist
B.lower
C.hoisted
D.lowered
单项选择题
A. foreign country’s
B. own country’s
C. A or B
D. A+B
单项选择题
A.outstanding
B.secret
C.A or B
D.A+B