1988年至1990年，一个名为“人口危机委员会”的组织对世界上100个大城市进行了调查。请根据下面12个主要大城市的调查表回答问题。

	Population (million)	(%)of income spent on food	Persons per room	(%)of houses with water and electricity	Telephones per 100 people	(%)of children in high school
Tokyo	28.7	18	0.9	100	44	97
Mexico City	19.4	41	1.9	94	6	62
New York	17.4	16	0.5	99	56	95
Sao Paulo	17.2	50	0.8	100	16	67
Osaka	16.8	18	0.6	98	42	97
Seoul	15.8	34	2.0	100	22	90
Moscow	13.2	33	1.3	100	39	100
Bombay	12.9	57	4.2	85	5	49
Calcutta	12.8	60	3.0	57	2	49
Buenos Aires	12.4	40	1.3	86	14	51
Los Angeles	11.5	12	0.5	94	35	90
London	11.0	24	0.6	100	50	58

Of the following cities, people live in ______spend least of their income food.
A. Mexico City        B. Buenos Aires       C. Calcutta
Which city has the most people?
A. New York          B. Moscow           C. Tokyo
The number of the students studying in high schools in Tokyo out of 100 students is the same as that of___________.
A. Seoul         B. Sao Paulo         C. Osaka
In which city do all the houses have water and electricity?
A. London       B. Los Angeles        C. New York
According to the passage, which sentence is true?
A.It is the most difficult for people in Calcutta to make a phone call.
B.The people in London have the less room for each person than those in Osaka.
C.The cities above are all in Asia.