單項選擇題

Stop search and return to（）.

A.keel
B.virgin
C.origin
D.base

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單項選擇題

Please（）search and rescue.

A.make command of
B.take command of
C.get command of
D.have command of

單項選擇題

MERSAR is replaced by（）.

A.IAMSAR
B.COMSAR
C.ICAO SAR
D.1979 SAR