One of the responsibilities of the Coast Guard is to make sure that all ships___

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问题 One of the responsibilities of the Coast Guard is to make sure that all ships_____follow traffic rules in busy harbors.

选项 A、cautiously
B、dutifully
C、faithfully
D、skillfully

答案 B

解析各项的意思是：cautiously“小心谨慎地”；dutifully“守本分地”；faithfully“忠诚地”；skillfully“熟练地”。

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OneoftheresponsibilitiesoftheCoastGuardistomakesurethatallships___