单项选择题
There are many navigational aids（）.
A.in chief engineer's room B.in chief officer's room C.on the bridge D.on deck
单项选择题 All entries in Logbook,（）made, must not be erased.
单项选择题 The pilot said he（）our vessel directly to berth.
单项选择题 Mooring lines both（）were let go.
