单项选择题
Attention is called to the fact that in many cases charted depths may be decreased by up to（）.
A.one natutical mile B.2 kilometers C.5 cables only D.one fathom
单项选择题 Be careful（）to mix them up.
单项选择题 Can you cut down the shortlanded cargo（）half?
单项选择题 Charted depths are decreased（）2 meters.
