If the circumstances admit，（）of small alteration of course and speed shall not be taken to avoid collision.

If the circumstances of the case admit，any vessel（）in a narrow channel.

A.shall have the liberty to anchor
B.shall avoid anchoring
C.shall moor to a buoy when necessary
D.shall keep anchoring

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In a crossing situation，a stand-on vessel which is forced to take action in order to avoid collision with a vessel on her own port side shall，if possible，avoid（）.

A.turning to port
B.turning to starboard
C.decreasing speed
D.increasing speed

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