2. 外语
  3. One of the responsibilities of the Coast Guard is to make sure that all ships obediently follow traffic rules in busy harbors.

One of the responsibilities of the Coast Guard is to make sure that all ships obediently follow traffic rules in busy harbors.

admin2010-01-13  10
问题 One of the responsibilities of the Coast Guard is to make sure that all ships obediently follow traffic rules in busy harbors.
选项 A、skillfully
B、safely
C、dutifully
D、currently
答案C
解析
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