A river was running happily through the hill, the valley (山谷)and the field. Soon it was stopped by a huge rock and the river was a little afraid and worried about what to do.
The rock said, "Hi, baby! Where are you going？"
The river answered, "I'm going to the sea. My mother is waiting for me. "
The rock made fun of the river and said, "You're too young. Go back to the hill at once. You can't get there. Don't come back here again!"
The river was surprised to hear that and said, "I can only go forwards (向前). There's no river that goes backwards(向后)!"
"Don't speak! If you don't go back, you'll have to change your direction. Don't try to run over my body!" The rock became angry and said.
The river asked helplessly, "Where should I go？"
"You can go anywhere you like. Just don't come close to me!"
While they were talking, more and more water came here. Then it began to get out of control. The river ran quickly over the rock and washed it hard.
The river said proudly, "A weak person will change his goal and direction. A strong person will only go ahead and nothing can stop him!"
a. The rock laughed at the river.
b. The river flowed over the rock.
c. A river started its journey from the hill.
d. The rock asked the river to change its direction.
e. A huge rock stopped the river.
