Permission is kindly （） about 1000 tons of clean sea water ballast，as and when required for trimming purposes．<br>A:requested to pump out<br>B:requested pumping out<br>C:requesting to pump out<br>D:requesting pumping out

Permission is kindly （） about 1000 tons of clean sea water ballast，as and when required for trimming purposes．
A:requested to pump out
B:requested pumping out
C:requesting to pump out
D:requesting pumping out

出自：海船船员证

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