At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents. 
#73068
A
turning to
B
watching over
C
watching out
D
digging out
推荐题目
He said he had seen that film ___.
#80960
A
yesterday
B
the next day
C
the following day
D
the day before
 Coral(珊瑚) is not a plant but a variety of animal life ________ and bright colors.
#71232
A
in different shapes
B
in a different shape
C
of different shapes
D
of a different shape
This page needed _____ again.
#65214
A
being checked
B
checked
C
to be checked
D
to check