Điền từ thích hợp vào chỗ trống

Like other big cities in Asia , Hanoi began to (1)..................... the tram system in the early 1900s. A few years later , due to its cheap fares and convenience , this system rapidly became one of the most popular means of transport.There were five tram routes with HoanKIem Lake as a central station for residents to get around the city and to the suburan areas. However (2)......the population boom and the urgent demand for upgrading the(3)....... mordern road system ,the rail tracks were gradually removed and completely disappeared in 1990.

These days ,the fact that the population of the capita; has risen tremendously results in a dramatic increase in (4)......number of vehicles on the roads . To meet the incresing travel demands and reduce traffic congestion , the first 13 - kilometre skytrain aystem , connecting Cat Linh va Ha Dong is launched and it is expected to be completed by 2018 .Each four -compartment skytrain with the length of approximately 80 metres and the height of about 3.8 metres has a capacity of 1,362 passengers .Additionally , a new rail system includingover eight kilometres of skytrain rail and four kilometres of submay rail , which links Hanoi Central Station to Nhon ,also has being built recently .The capacity of each skytrain in this efficent high-speed rail sustem is roughly 1,200 passengers.
1) A improve B install C operate D discover
2) A despite B because C in order to D because of
3) A fewer B less C more D a lot
4) A a B an C the D zero article
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