73. This machine hasn't been used for years.

74. It is impossible for roses to grow in such poor ground.

75. Recycled plastic is used to make toys and utensils.

76. I haven't played tennis since 1990.

77. Would you mind not smoking in the kitchen?

78. I haven't seen her for two months.

80. We are going to have my car repaired by the repairman next week.

81. The film was so interesting that we watched it several times.

82. Ann asked Hanh where she was going the following weekend.

83. The environment should be kept clean.

74. for roses to grow in such poor ground

75. plasic is used by them to make toys and utensils

76. played tennis since 1990

78. seen her for 2 months

79. you can buy tax free goods before you get on the plane

80. the repairman to repair my car next week

81. was very interesting, we watch it several time

82. hanh where was she going nextweek

83. should be kept clean

chúc bạn học tốt ^^