[单项选择]The fact that key members of team that built America's first nuclear bomb were foreigners is used to ______.


A. prove that foreign experts are important for the U. S.
B. prove visa system used to be more effective in the past
C. show that visa system was not really necessary in the past
D. explain that countries have always been competing for professions

[单项选择]The fact that key members of team that built America's first nuclear bomb were foreigners is used to ______.


A. prove that foreign experts are important for the U. S.
B. prove visa system used to be more effective in the past
C. show that visa system was not really necessary in the past
D. explain that countries have always been competing for professions

[单项选择]The first successful English colony in North America was planted in ______.


A. Virginia
B. Miami
C. Massachusetts
D. New Jersey

[单项选择]The homeless make up a growing percentage of American’s population． (62) homelessness has reaches such proportions that government can’t possibly (63) ．T0 help homeless people (64) independence, the federal government must support job training programs, (65) the minimum wage, and fund more low-cost housing． (66) everyone agrees on the numbers of American who a e homeless．Estimates range (67) from 600, 000 to 3 million． (68) the figure may vary, analysts do agree on another matter：that the number of the homeless is (69) , one of the federal governments’ studies (70) that the number of the homeless will reach nearly 19 million by the end of this decade．
Finding ways to (71) this growing homeless population has become increasingly difficult． (72) when homeless individuals manage to find a (73) that will give them three meals a day and a place to sleep at night, a good numb
A. inflating
B. expanding
C. increasing
D. extending