Fill in the blanks with suitable prepositions. Metro Rail is a popular and efficient mode (a)____ transportation that allows commuters to travel quickly (b)____ cities. It is a train system that often has dedicated tracks and stations, which enables it (c)____ bypass congested roads. Many cities (d)____ the world have implemented Metro Rail systems (e) ____ reduce traffic congestion and improve air quality..Metro Rall can also decrease travel time (f) ____ commuters as the trains travel fast and stop less frequently. Riding (g) ____ a Metro Rail system is simple and convenient. Passengers can purchase tickets or use smart cards to pay for their trip, board the train, and then get (h)____ at their desired station. Many Metro Rail trains are equipped (i)____ amenities like air conditioning and comfortable seating to make the journey more enjoyable (j)____ passengers.