50. A. won't           B. don't             C. can't           D. aren't

A

     One day Mother Horse said to Little Horse, “You have grown big and can help Mummy now. Take this half bag of rice to Uncle Pig, will you?”“Yes, Mummy,”said Little Horse. With the bag on his back, he ran to Uncle Pig's house. Soon, he came to a river. “Is there a bridge here?”Little Horse said to himself. He looked around for help. There he saw a cow standing by the river.

      Little Horse went up to her and asked, “Aunt Cow, I have to go to Uncle Pig's house. Is there a bridge near here?”

      “No, there is not any. If you want to go to his house, you have to cross the river.”

      “Is the water very deep?”

      “No, it isn't deep. I've crossed it many times.”

      When Little Horse went near the river, Brother Cat ran up to him. He said, “Little Horse, you can't cross the river. It's very deep. You will get drowned(淹死).”What should I do? Shall I go on or shall I go back?" Little Horse thought, “I'd better go home and ask Mummy.”So Little Horse went home and told his mother the whole thing.

      Mother Horse said, “My child, both the cow and the cat were right in their own way. It won't do if you only listen to other people's ideas. You should think everything over by yourself.”

     Little Horse ran back to the river. He found that the water wasn't very deep for him. Soon he got to one other side.

49. A. must            B. may             C. have to         D. can

48. A. lend...to         B. give...back       C. keep            D. borrow…from

47. A. to trouble        B. to meet          C. to say          D. troubling

46. A. polite           B. politely          C. police          D. quietly

45. A. something       B. anything         C. everything      D. nothing

44. A. stands          B. stood            C. stand           D. standing

43. A. knocked at      B. knocking at       C. knock on        D. knock to

42. A. returned        B. return            C. returning       D. gave