相关考题
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单项选择题
Fishing gear with buoys ahead（）you.
A.of
B.on
C.for
D.at -
单项选择题
It is（）to anchor in your present position.
A.danger
B.dangered
C.dangeroused
D.dangerous -
单项选择题
A long blast to warn the vessels（）vicinity.
A.in
B.on
C.at
D.for
