19. The Iroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting. D
(A) but supplementing(B) and had supplemented(C) and even though they supplemented(D) although they supplemented
(E) but with supplementing1.其中A为什么不能认为were省略?是不是were supplementing表示动作的过程,所以错误A缺少主语,were肯定也不能省略,第一个were是系动词,第二个是表示时态的2.C错误的原因是OG12里面解释说and even though creats a sentence fragment—为什么句子不完整?,and引导并列句,可是and后只有让步状语从句,没有主句,所以是不完整的句子6. In late 1997,the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing and fungus was growing on the walls.
这是正确的句子,OG12解释中C /D错误的一部分原因是them指代tourists,但是正确的句子里them就一定不指代tourists,指代chambers?
-- by 会员 taozike (2009/12/25 16:48:57)