58. What is the proper meaning of the underlined word "boost"?   

A. increase                                                             B. grasp         

C. miss                                                                     D. possess

57. Justin Halberda and his colleagues ran some tests to               .    

A. look at the students' math scores dating back to kindergarten.

B. ask the students to estimate the dots

C. see if a person's inborn number sense has something to do with math learning

D. decide how to learn math well

56. Which of the following is not true according to the passage?    

A. Everyone has an inborn number sense.

B. Those who have a strong number sense are sure to do well in math.

C. Some of the math skills are inborn.

D. Doing a lot of math exercises may help to learn math well.

54. A. promote             B. extend                      C. stretch                     D. spread   

53. A. fled                     B. bought                     C. rescued                   D. killed  

52. A. notice                 B. news                         C. information              D. journalist    

51. A. animals              B. machines                 C. natures                    D. plants    

50. A. mixture               B. connection              C. relation                    D. combination  

49. A. feeding         B. providing            C. supplying              D. throwing