Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following sentences. 51. According to the results of a survey which conducted by a USA magazine, there isn't really A B с a generation gap. D 52. The survey shows that today's generation of young people generally get along well with their A B parents and appreciate the way they're being risen. C D 53. His parents asked him to buy books which he found them useful and necessary for his study. A B C D 54. The number of articles published on the generation gap are really amazing. B C D A 55. With the discovery of the new material, the equipment are greatly improved. A B C D
