One of the responsibilities of the Coast Guard is to make sure that all ships ______ follow traffic rules in busy harbors.
A、
skillfully
B、
currently
C、
obediently
D、
perpendicularly
【正确答案】
C
【答案解析】
海岸警卫队的责任之一就是保证所有的船只在繁忙的港口遵守交通规则。A．skillfully“熟练地” B．currently“时下，当下”C．obediently“服从地．顺从地”D．perpendicularly“垂直地”
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