单项选择题 It must never be forgotten（）the master has no authority to take extraordinary measures for the cargo owner if the latter or his representative can be communicated with.

单项选择题 It has been held that the Shipowner will be liable for the loss of or damage to the goods even if this is due to excepted perils，unless he can prove that he has（）proper care of them whilst they were in his custody.

单项选择题 It has been decided that a collision due to any cause other than the negligence of the Shipowner or his servants is within the scope of（）.