51. The older New England villages have changed relatively little ________ a gas station or two in recent decades.
A) except
B) besides
C) in addition to
D) except for（D）

52. The Car Club couldn’t ________ to meet the demands of all its members.
A) ensure
B) guarantee
C) assume
D) confirm（B）

53. Extensive reporting on television has helped to ________ interest in a wide variety of sports and activities.
A) gather
B) generate
C) assemble
D) yield（B）

54. The president promised to keep all the board members ________ of how the negotiations were going on.
A) informed
B) inform
C) be informed
D) informing（A）

55. Eating too much fat can ________ heart disease and cause high blood pressure.
A) contribute to
B) attribute to
C) attend to
D) devote to（A）

56. All the tasks ________ ahead of time, they decided to go on holiday for a week.
A) had been fulfilled
B) were fulfilled
C) having been fulfilled
D) been fulfilled（C）

57. This article ________ more attention to the problem of cultural interference in foreign language teaching and learning.
A) calls for
B) applies for
C) cares for
D) allows for（A）

58. He was punished ________ he should make the same mistake again.
A) unless
B) lest
C) if
D) provided（B）

59. Petrol is refined from the ________ oil we take out of the ground.
A) fresh
B) original
C) rude
D) crude（D）

60. ________ in the United States, St. Louis has now become the 24th largest city.
A) The fourth biggest city it was
B) Once the fourth biggest city
C) Being the fourth biggest city
D) It was once the fourth biggest city（B）