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The book was written in 1946, _____ the education system has witnessed great changes.
#77528
A
when
B
during which
C
since when
D
since then
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The news has spread all over the country _____ Premier Wen Jiabao will attend the Copenhagen summit next week.
#78595
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that　　　
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which
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whether
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what
A good advertisement, _____ people attach positive meanings, can contribute to the sales of a product．
#78507
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for which
B
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C
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D
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Do you know the reason ________he was late for the class?
#78586
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why
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that
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I don’t like ____you laugh at her.
#77544
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the way of which
B
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C
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D
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Mass deaths of birds were not unheard of, but they normally happened unnoticed at sea or in rural areas away from towns. Many birds are weak and die in winter _______ food is scarce.
#76616
A
which
B
what
C
when
D
how