单项选择题
Don’t（） this news to the public until we give you the go-ahead.
A.release B.relate C.relieve D.retain
单项选择题 Don’t（）things too seriously.
单项选择题 Do you understand（）I said?
单项选择题 Before assuming command of a vessel，the new OOW must discuss with the one being（），all important operational features of the ship.
