The Navigation Rules state that a vessel shall be operated a

In determining a safe speed ________ shall not be among those taken into account．

A.the state of visibility

B.the power of the vessel

C.the traffic density

D.the maneuverability of the vessel

No oil or mixture containing oil ______ into Singapore waters from any vessel．

A.shall not be discharged

B.shall be discharged

C.shall be filled

D.shall not be filled

The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

A. once

B. when

C. if

D. unless

Every vessel which is directed by these Rules to keep out of the way of another vessel shall, if the circumstances of the case admit, avoid ______.

A.crossing ahead of the other

B.crossing astern of the other

C.passing port to port

D.passing starboard to starboard

In a narrow channel or fairway when overtaking can take place only if the vessel to be over-taken has to take action to permit safe passing， the vessel intending to overtake shall indicate her intention by sounding appropriate signal． This means that ________ ．

A.the vessel to be overtaken shall sound appropriate signal first

B.the overtaking vessel shall sound appropriate signal first

C.the overtaking vessel shall take action to permit safe passing

D.the vessel to be overtaken shall take action to permit safe passing before hearing appropriate signal

材料：

This insurance also covers the insured vessel&39;s proportion of general average，salvage or salvage charges，but in case of general average sacrifice of the vessel，the Insured may recover fully for such loss without obtaining contributions from other parties．

General average shall be adjusted in accordance with the relative contract and governing law and practice．However，where the contract of affreightment or carriage does not so provide，the adjustment shall be made according to the Beijing Adjustment Rules or similar provisions of other rules． Where all the contributing interests are owned by the Insured，or when the insured vessel sails in ballast and there are no other contributing interests the provisions of the Beijing Adjustment Rules（excluding Article 5），or similar provisions of other rules if expressly agreed，shall apply as if the interests were owned by different persons．

The voyage for this purpose shall be deemed to continue from the port or place of departure until the arrival of the vessel at the first port or place of call thereafter other than a port or place of refuge or a port or place of call for bunkering only．If at any such intermediate port or place there is an abandonment of the adventure originally contemplated the voyage shall thereupon be deemed to be terminated.

问题：

In the event of general average sacrifice of the insured vessel，the insured ______．

A.can only recover the insured vessel’s proportion from the Insurer

B.should recover fully for such loss by obtaining contributions from the other parties

C.may recover fully for such loss from the Insurer prior to his obtaining the contributions from other parties

D.shall own all the contributing interests

General average adjustment shall be made according to the Beijing Adjustment Rules or similar provisions of other rules if _____．A.the relative contract does not provide according to which law and practice the adjustment shall be made

B.the contributing interests are owned by different persons

C.the contract of affreightment or carriage requires that some other governing law be followed

D.there is a sacrifice of the insured vessel

If the insured vessel sails in ballast and there are no other contributing interests，______．A.the general average adjustment shall be made according to the relative contract of carriage

B.all the provisions of Beijing Adjustment Rules shall be applied in case of any general average

C.no general average adjustment is needed

D.the general average shall be adjusted as if there were different contributing interests according to the provisions of Beijing Adjustment Rules

The word“contemplated”in the last paragraph of this passage means _____．A.“looked at”

B.“intended”

C.“contended”

D.“meditated”

请帮忙给出每个问题的正确答案和分析，谢谢！

According to the navigation rules, all of the following are engaged in fishing except a vessel ______.

A.Setting nets

B.Trawling

C.Using a dredging net

D.Trolling

In determining a safe speed of your ship, _____ shall not be among those taken into account.

A.the state of visibility

B.the traffic density

C.the number of crew on board

D.the maneuverability of the vessel