※ 引述《heystranger (森V森V)》之铭言：
: 24. The Iroquois were primarily planters, but supplementing their cultivation
: of maize, squash, and beans with fishing and hunting.
: (A) but supplementing
: (B) and had supplemented
: (C) and even though they supplemented
: (D) although they supplemented(O)
: (E) but with supplementing
: 这题没有特别大的疑问,只是想询问如果C选项去掉and,
: 即even though they supplemented......这样算正确吗?
: 印象中although用法与even though相去不远
: 先谢谢大大解答~
even though 跟although意思的确相差不大。
所以这边并非主要的的解题点。
以下附上even though的SC正确句子：
Even though the direct costs of malpractice disputes amounted to less than
1 percent of the $541 billion the nation spent on health care last year,
doctors say fear of lawsuits plays a major role in health-care inflation.
Even though sub-Saharan Africa often evokes images of drought and famine,
researchers say that the area is the home of more than 2,000 grains,
vegetables, roots, fruits, and other foods that could feed the continent
and even other parts of the world.
Even though it was not illegal for the bank to share its customers'
personal and financial information with an outside marketing company in
return for a commission on sales, the state's attorney general accused the
bank of engaging in deceptive business practices by failing to honor its
promise to its customers to keep records private.
Unlike the other major planets, Pluto has a highly eccentric orbit and is
thus closer to the Sun than Neptune is for 20 years out of every 230-year
cycle, even though it is commonly described as the remotest planet in the
solar system.
Even though her career was cut short when she was in her prime and the
fifteen recordings she made were disappointing artistically as well as
technically, Olive Fremstad (1871-1951) has never been entirely forgotten
by opera aficionados.
- 总结 -
以上可以看得出来：
1. even though也是GMAT接受的正确用法。
2. 句意上判断，就算换成although也是合理。
3. 摆句首、摆句尾都可以。