16．
Jill and her husband，John，went on their holiday to America and swam with dolphins．They would not be able to go on a holiday like this again and for them this would be a"once in a lifetime holiday"．
At last the exciting day came．With many other people，they saw a video about dolphins and learned a lot about these wonderful sea animals．Then it was time to go into the sea!Jill cried with happiness when she saw the dolphins for the first time．
All the people walked slowly into the sea with the teacher and soon they were all swimming．The dolphins came near and Jill and John could touch them as they swam!The dolphins liked to have people near them and no one was scared （害怕的）．After one hour，the people left the sea and had a sandwich．
In the afternoon，everyone could go back in the sea and swim for another hour with the dolphins．The teacher showed them how he could"speak"to the dolphins by using his hands in
certain ways．
At last，Jill and John had to leave．It was a wonderful celebration for being 60!They knew they would not return but they would tell all their friends how exciting it is to swim with dolphins!
46．Where did Jill and John go for their holiday？To America．
47．What did Jill and John do before going into the sea？They saw a video and learned a lot about dolphins．
48．How did the teacher"speak"to the dolphins？By using his hands in certain ways．．
