In case of accidents()the risk of sinking,all effective measures shall be taken to steer clear of the fairway to avoid()the traffic.
A、involving/impeding
B、involved/to impede
C、involving/to impede
D、involved/impeding
A、involving/impeding
B、involved/to impede
C、involving/to impede
D、involved/impeding
A、all kinds of cases B、two kinds of cases C、cases involving foreign citizens D、cases involving a state