Reading is the key to unknown worlds. When I open a ________，I enter a colorful world.

Twenty Thousand League Under the Sea is a great book that I can't put down. It is about a wonderful trip all around the world ________ the surface of the sea. There is also sunlight underwater，so I can ________ rocks and coral（珊瑚）reflecting the sunlight in the water. It is fun to walk in water. It is fun to walk in the undersea forest，________ the leaves of trees grow well.

But there are other worlds to travel to as well. Let's take a broom（扫帚）and ________ to Hogwarts with Harry Porter. Hogwarts is a magic ________for wizards（巫师）.Students there have many interesting things. They fly on brooms and play Quiddiitch，a（n）________ like soccer but played in the sky.

There is still ________ to see. I can go and open the gate to the Secret Garden. In this story，a rich man locks up his garden because his beloved wife died. But Mary，a young girl，comes to ________ the lifeless garden. The grass and trees turn green，the roses bloom again，and a lost friendship comes back to Mary's life.

Reading breaks time and distance. Our lives are short，but there's ________ an end to reading. I hope I will never stop reading.