Using technology as new as space-age fabrics and as ordinary as common dry-cleaning chemicals, scientists and historians, in their attempt at cleaning and preserving the American flag that flew over Fort McHenry in Baltimore in 1814, are hoping that it will then last another 200 years.
and as ordinary as common dry-cleaning chemicals, scientists and historians, in their attempt at cleaning and preserving the American flag that flew over Fort McHenry in Baltimore in 1814, are hoping
and as ordinary as common dry-cleaning chemicals, scientists and historians are attempting to clean and preserve the American flag that flew over Fort McHenry in Baltimore in 1814, hoping
and as ordinary as common dry-cleaning chemicals, an attempt by scientists and historians to clean and preserve the American flag that flew over Fort McHenry in Baltimore in 1814 is being made in the hope
but also as ordinary as common dry-cleaning chemicals, scientists and historians who are attempting to clean and preserve the American flag that flew over Fort McHenry in Baltimore in 1814, hoping
but also as ordinary as common dry-cleaning chemicals, an attempt by scientists and historians at cleaning and preserving the American flag that flew over Fort McHenry in Baltimore in 1814 in hopes
but also 没搭配的not only ---排除DE
主语应该是scientists an historians,不是an attempt---排除CE
AB的区别
A:scientists an historians,插入语in their attempt,are hoping
谓语是hope---主要动作 状语---在他们的尝试里 不合逻辑;且attempt,明显做动词,而不是这里的名词
B:scientists an historians are attempting to do, hoping
谓语:尝试 伴随状语:希望 符合逻辑
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