单选题
One of the
responsibilities
of the Coast Guard is to make sure that all ships strictly follow traffic rules in busy harbors.
A、
cautiously
B、
dutifully
C、
faithfully
D、
skillfully
【正确答案】
B
【答案解析】
[解析] dutifully“守本分地”。cautiously“小心谨慎地”；faithfully“忠诚地”；skillfully“熟练地”。
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