GRE

简答题 Of the five uniformed armed forces of theUnited States.only four are within the Department ofDefense;the coast guard now resides within the Departmentof Homeland Security,but it may ___________to navalcontrol if the Congress declares War.

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A.
Understanding the entire meaning of the sentence will help you choose correctly.The coast guard“now”resides in a different department;presumably it was once with the other armed forces.It may go back,or revert(choice A), to naval control in times of War.