单项选择题
To agree with larger scale chart, latitudes taken from this chart should be increased（）about 8 seconds.
A.with B.in C.by D.to
单项选择题 Traffic lanes（）on this chart are recommended for use by all vessels.
单项选择题 Vessels must navigate（）caution in this area.
单项选择题 We have finished（）and are ready for sailing.
