—Swimming in the river for teenagers is very dangerous.—So it is. If I ________ them, I ________ a shower at home.

The headmaster with his students                   Hangzhou Paradise Park if it             tomorrow.

If I              a bird, I                  _ fly in the blue sky.

— Come and join us, Ben!— I’m afraid I can’t. I’m too busy now. If I ________ time, I would certainly go.

 ---What if I have to go there and know nothing about it?--- If I______ you, I would try to find some information about it on the Internet.