问题
选择题
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
答案
答案：B
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。