At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents
A.turning to
B.watching over
C.watching out
D.digging out
网友回答
B解析短语辨析。
A. 转向
B.看守；照管
C.小心；提防
D.掘出；发现。句意：在海边或者游泳池，救生员是一个负责照管他人，防止他们出现事故的一个人。故选B。