Mariners proceeding across the main routes are recommended to do so at（）.

Mariners proceeding across the main routes are（）to do so at as wide an angle as practicable.

A.recommended
B.reported
C.applied
D.complied

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Mariners are reminded that they should proceed in the general direction indicated by the arrows or，if（）a lane，they should do so as nearly as practicable at right angles to it.

A.cross
B.crossing
C.crossed
D.crosses

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