A. cu when(4)
He reached her when she was beggining to drown.
B. He managed to pull her back to the shore and finally save her.(5)
C. He saw that she was in trouble and immediately dived in to save her.(3)
D. Fred was sunbathing on the beach by the time he saw a woman waving at him.(1)
E. He thought that she was just being friendly.(2)