（A） After crude oil， natural gas is the United States second biggest fuel source and supplied almost
exclusively from reserves in North America.
（B） Natural gas， after crude oil the United States second biggest fuel source， supplied almost exclusively from reserves in North America.
（C） Being supplied almost exclusively from reserves in North America， natural gas， the United States second biggest fuel source after crude oil.
（D） Natural gas， the United States' second biggest fuel source after crude oil， is supplied almost exclusively from reserves in North America.
（E） Natural gas is supplied almost exclusively from reserves in North America， being the United
States' second biggest fuel source after crude oil.
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10. The airline industry is cutting its lowest discount fares more widely， more substantially， and earlier
this year than it normally does at the end of the summer， a time during which travel usually
decreases and the industry uses some lower fares for the attraction of passengers.
（A） during which travel usually decreases and the industry uses some lower fares for the attraction of
（B） during which travel usually decreases and therefore the industry will use some lower fares for the attraction of
（C） in which travel usually decreases and in which the industry therefore uses some lower fares
attracting
（D） when travel usually decreases and the industry uses some lower fares to attract
（E） when travel usually decreases and therefore the industry will use lower fares for the attraction of
11. The aristocratic values expressed in the writings of Marguerite Yourcenar place her within the
French classical tradition， as does her passionate interest in history， particularly Roman history.
（A） as does
（B） so do
（C） as do
（D） so is the case with
（E） similarly， does
12. Selling several hundred thousand copies in six months， the publication of “Maple Leaf Rag” in
1899 was an instant hit， helping to establish Scott Joplin as the preeminent ragtime composer.
（A） Selling several hundred thousand copies in six months， the publication of “Maple Leaf Rag”
in 1899 was an instant hit， helping to establish Scott Joplin as the preeminent ragtime composer.
（B） The publication in 1899 of “Maple Leaf Rag” was an instant hit： in six months they sold several hundred thousand copies and it helped establish Scott Joplin as the preeminent
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