37. Ha Long city / have/ some traffic problems
=> Ha Long city has some traffic problems
38. there / many people /use/ the road / too many vehicles / roads.
=> There are many people using the road for too many vehicles on the roads
39. many roads / narrow / bumpy .
=> Many roads are many narrow and bumpy
40. many young children / ride / bikes/ dangerously.
=> Many young children ride bikes very dangerously
41. I / think / people/ be/ careful / obey / traffic rules.
=> I think people are careful to obey the traffic rules