63. Mathematics ……………….very interesting to me . A. are​B. have been​C. were​D. is

62. The staff ……………in the conference room at the moment . A. are meeting​B. were meeting​C. meet​D. is meeting

62. The staff ……………in the conference room at the moment . A. are meeting​B. were meeting​C. meet​D. is meeting

60. Either of these buses ……………….past the university . A. go​B. have gone​C. gone​D. goes

59. The books, an English dictionary and a chemistry text , …………on the shelf yesterday. A. was​B. were​C. is​D. are