[单项选择]Passage 1 Britain almost more than any other country in the world must seriously face the problem of building upwards，that is to say of accommodating a considerable proportion of its population in high blocks of flats．It is said that the Englishman objects to this type of existence，but if the case is such, he does in fact differ from the inhabitants of most countries of the world today．In the past our own blocks of flats have been associated with the lower-income groups and they have lacked the obvious provisions，such as central heating，constant hot water supply, electrically operated lifts from top to bottom，as well as such details，important notwithstanding(然而)，as easy facilities for disposal of dust and rubbish and storage places for baby carriages on the ground floor, playgrounds for children on the top of the buildings，and drying grounds for washing．It is likely that the dispute regarding flats versus(对抗)individual houses will continue to rage on for a long time as far as Brit
A. They were mostly inhabited by people who did not earn much．
B. They were usually not large enough to accommodate big families．
C. They were sold to people before necessary facilities were installed．
D. They provided playground for children on the top of the buildings．