单项选择题
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
单项选择题 If you do not wear goggles and helmet，your chances of being（）will be greater.
单项选择题 If the sling bumps（）the beams，serious accidents may follow．
单项选择题 I have（）damage below water line.
