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單項選擇題

My position has been obtained by（）.

A.astronomical observation
B.hydrographic survey
C.weather prediction
D.current sailing

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單項選擇題

My propeller was hit by a steel barge lying（）.

A.ahead
B.astern
C.alongside my port bow
D.alongside my starboard bow

單項選擇題

My rudder indicator is（）good working order.

A.in
B.on
C.at
D.for