问题
单项选择题
Navigate with（）.Small fishing boats are within 0.8 miles of me.
A.careful
B.skill
C.concern
D.caution
答案
参考答案：D
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Navigate with（）.Small fishing boats are within 0.8 miles of me.
A.careful
B.skill
C.concern
D.caution
参考答案：D