71.  You'd better see a doctor if you are not feeling well after you take two pills.

72.  In the road, the flowers are being watered and some more trees are being planted.

73.  Some boots on the banks of the lake are being prepared.

74.  They are doing very happily.

75.  The building's roof is being mended and the walls are being painted.

76.  The follows are being watered.

77.  Many more trees are being planted.

78.  Some boats on the bank on the lake are being repaired.

79.  We are going to visit the Ming Tombs in the afternoon.

80.  The plants are being watered, some boats on the bank of the lake are being repaired .