阅读下面短文，从短文后各题所给的A，B，C和D四个选项中，选出可以填入空白处的最佳选项。
Two weeks earlier, my son, Ben, had got in touch. He'd moved to England with his mum when he was three and it had been 13 years since I'd 1 seen him. So imagine my 2 when he emailed me saying he wanted to come to visit me.
I was 3 ! I arrived early at Byron Bay where we were supposed to 4 . The bay was5 in sunshine, and there was a group of kayakers around 150m off the shore. Getting a little 6 .I realized one kayak（皮划艇）was in 7 . "Something's not 8 !" I took off my T-shirt and 9 into the water. I saw there were two instructors on board and a man lying across the middle. He was 10 violently. Linking arms with one of the instructors. I helped 11 the young man out of the water. He was unconscious and as I looked at his face, something 12 to me. Those brown eyes were very 13 . "What's his name?" I asked the instructor. "Ben," he replied, and immediately I 14 . That stranger was my son!
The instructors called for an ambulance. 15, after a brief stay in hospital. Ben was well enough to be allowed to 16 and later the family met up for dinner. We chatted about everything and then Ben 17 to me. "I'm just want to say thank you," he said, "You 18 my life!"
I still can't believe what a 19 it was. I'm just so glad I was there 20 to help my son.
