| A.Taking a walk on the shore. |
| B.Watching the young man dance. |
| C.Meeting up with the young man. |
| D.Helping the young man pick up starfish. |
| A.To have fun. |
| B.To study starfish. |
| C.To feed some fish. |
| D.To save starfish. |
| A.Each of us should learn to protect starfish. |
| B.People living on the shore always try to save starfish. |
| C.Each of us has the ability to make an important effect on something. |
| D.People can come up with some good ideas when walking on the shore. |