单项选择题
A. rolling up B. rolls up C. rolled up D. roll up
We shall prepare for(港口国)（）inspection.A.PSCB.ARPAC.GPSD...
单项选择题We shall prepare for(港口国)（）inspection.
A.PSC B.ARPA C.GPS D.ECDIS
（）（降）the flag.A.HoistB.TopC.LowerD.Bring
单项选择题（）（降）the flag.
A.Hoist B.Top C.Lower D.Bring
You should keep national flag（飘扬）（）.A.flewB.flownC.flyi...
单项选择题You should keep national flag（飘扬）（）.
A.flew B.flown C.flying D.flies
