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单项选择题

'When was the jigsaw puzzle first invented……

When was the jigsaw puzzle first invented

A．Not earlier than 1800.
B．1930's.
C．1750 to 1799.
D．Not known.

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热门试题

单项选择题It seems that bilingual services like bilingual ballots______.

A．are being phased out in the U.S.
B．are rejected by minorities
C．are approved by the majority of San Fransico's voters
D．are backed up by the government and legislature

单项选择题Bilingualism could be described as all the following EXCEPT______.

A．bilingualism is equivalent to biculturalism
B．bilingualism is a controversial issue in the U. S.
C．bilingualism has worked in some areas of the U.S.
D．bilingualism helps minorities to function more effectively in English

单项选择题The author's purpose of writing this article is ______.

A．to make known his point of view in the debate on bilingualism
B．to arouse peoples' sympathy for the minorities
C．to advocate educational reforms
D．to present facts concerning bilingualism

单项选择题Allowing imitation is one of the distinctive characteristics of television. This means ______.

A．children can learn the norms of certain behavior in a society
B．children are exposed to unfamiliar lifestyles cultures
C．children can learn basic skills essential for schooling
D．children can learn how to act in plays

单项选择题The topic of the passage is ______.

A．the harmful influence of television in the home environment
B．the role of television in the socialization of children
C．the American children's television-viewing pattern
D．the role of mass media in developing children's basic skills