The look-out must be able（）full attention to the（）of a proper look-out．<br>A:to give/keep<br>B:giving/keeping<br>C:giving/keep<br>D:to give/keeping

The look-out must be able（）full attention to the（）of a proper look-out．
A:to give/keep
B:giving/keeping
C:giving/keep
D:to give/keeping

出自：海船船员证

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