Ha Noi City has a big traffic problem. There (21) are milions of vehicles such as motorbikes and cars. The roads are too small and too (22) busy.

People are always stuck (23) in a traffic jam. Public transport is more eco-friendly (24) because it can carry more people but it is often slow. Traffic is a serious problem in this city.

One feasible (25) solution to this problem is the subway, (26) which is being built and (27) will open as soon as possible. It is fast and can help the city (28) reduce pollution and traffic congestion. It can also carry thousands of people every day. Travelling (29) by subway will help Ha Noi City to (30) solve the traffic problem.

Ha Noi City has a big traffic problem. There (21) are milions of vehicles such as motorbikes and cars. The roads are too small and too (22) busy.

People are always stuck (23) in a traffic jam. Public transport is more eco-friendly (24) because it can carry more people but it is often slow. Traffic is a serious problem in this city.

One feasible (25) solution to this problem is the subway, (26) which is being built and (27) will open as soon as possible. It is fast and can help the city (28) reduce pollution and traffic congestion. It can also carry thousands of people every day. Travelling (29) by subway will help Ha Noi City to (30) solve the traffic problem.