Choose the correct answer

51. I haven’t applied for this job ________.
A.Just                B. never        C. ever            D. yet
52. Has Mary listened to the song ________ 2 hours?
A.for                B. never        C. ever            D. yet
53. Where_________ you__________ on the Tet holiday last year?
 A. do - go                      B. did - gone                C. did - go             D. did - went 
54. _______ people used to read more.
A. Twenty years before             B. Twenty years ago
C. For twenty years                  D. Since twenty years
55. I _______ there once a long time ago and _______ back since.
A. was / have not been             B. had been / was not
C. would be / had not been             D. have been / will not be
56. All students ____ wear uniforms at school because it is a rule.
A. should        B. have to             C. ought to         D. must
57. This drink isn't beneficial for health. You ____ drink it too much.
A. should         B. ought to not         C. ought not to     D. mustn't 
58. This warning sign indicates that you ____ step on the grass. 
A. shouldn't         B. mustn't             C. don't have to     D. ought not to 
59. I think you ____ do exercise regularly in order to keep your body in good shape. 
A. must        B. should             C. ought to         D. Both B and C
60. Hoa ____ feed the cats because her mother has done it already. 
A. has to         B. doesn't have to        C. must        D. Both A and C