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 toB．watching overC．watching outD．digging out
B
短語辨析。A. 轉(zhuǎn)向   B.看守；照管C.小心；提防    D.掘出；發(fā)現(xiàn)。句意：在海邊或者游泳池，救生員是一個(gè)負(fù)責(zé)照管他人，防止他們出現(xiàn)事故的一個(gè)人。故選B。
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