Complete Answers:

$71.$ Most streets and roads in our city are narrow and in bad conditions.

$72.$ Many people do not strictly follow the traffic laws when using the roads.

$73.$ For example , they cross the street at wrong places and ride motorbikes in wrong direction. 

$74.$ Many street vendors occupy the pavement to display their goods and sale to pedestrians walking in the road. 

$75.$ The number of strucks in our city are very big so they interfere with traffic flow.

$76.$ Construction of houses and buildings are not carefully planned so they occupy the surface of the roads. 

71.Most streets and roads in our city are narrow and in bad conditions 

72. Many people do not strictly follow the traffic laws when using the roads .

73. For example , they cross the street at wrong places and ride motorbikes in wrong direction 

74. Many street vendors occupy the pavement to display their goods and sale to pedestrians walking in the road 

75. The number of strucks in our city are very big so they interfere with traffic flow.

76. Construction of houses and buildings are not carefully planned so they occupy the surface of the roads.