One of the responsibilities of the Coast Guard is to make sure that all ships _______ follow traffic rules in busy harbors.
- AA cautiously B dutifully C faithfully D skillfully
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One of the responsibilities of the Coast Guard is to make sure that all ships _______ follow traffic rules in busy harbors.
选［B］。所给四个副词的意思分别是：［A］谨慎地；［B］尽职地，顺从地；［C］忠实地；［D］灵活地，巧妙地。对于轮船来说，遵守交通规则是它们的职责，所以只能选［B］。本句大意：海岸护卫的责任之一就是要确保在繁忙的港湾所有的船只都要尽职地遵守交通规则。