题目内容：

Lisa, a middle-aged woman, went to prepare lunch, leaving her 3-year-old son, Barney, playing by himself in the backyard.

  All of a sudden, a sharp cry of Barney came into the mother's ears, and Lisa rushed into the backyard and found a big snake entwining（纠缠） the little child with its body and trying to swallow the boy. Lisa was terrified and quite angry. She made up her mind to save her son from the snake's mouth.

  It was a fearless mother's love that made Lisa forget what she faced. She took up an old hatchet （斧头）from the ground and struck the snake with all her strength.

  One...two... With the hatchet, Lisa hit the snake again and again, but she felt as if she were striking a mass of solid(坚固的) rubber. The little boy's voice and breath were getting weaker and weaker. Lisa's heart was broken and she nearly went mad.

  Suddenly Lisa put aside the hatchet and threw herself on to the snake, opened her mouth and bit into its back, as if tearing a tough steak（牛排）. Lisa was really mad.

  A small piece of flesh was bitten off. Lisa picked up the hatchet again and hit at the wound in the snake's back madly and savagely.

  Stinking blood was spraying out of the snake's body. The snake was so badly wounded that it let go of Barney and moved back into the forest. It had never imagined that human beings had such terrible, sharp teeth. Halfway home, the snake died.

1.Why did Lisa fail in killing the snake at first?

A. Because she was afraid that what she did would hurt her son.

B. Because the hatchet was not sharp enough and the snake's skin was too hard.

C. Because the snake was even stronger than Lisa.

D. Because she was too astonished to do anything.

2.________, so she bit the snake.

A. Lisa was really driven mad

B. Lisa thought her teeth were much sharper than the hatchet

C. Lisa couldn't refuse the temptation of the snake's meat

D. Lisa had not got any other way to deal with the snake

3.From the story, we learned that it was a mother's love that made___________ .

A. Barney brave    B. the snake frightened

C. Lisa mad and angry    D. the woman fearless

4.What does “made up her mind” in the second paragraph probably mean?

A. was determined    B. presented    C. wandered    D. was shocked