大全16,21题,标点符号

BetterMan

两道题,结构类似,但OG的解释中,一个说要",",一个没有说要也算对了. 怎么理解这个问题呢?

1,大全21.
按OG的说明,这里没有在 yet 之前要",";
。。could carry … yet was so light that..

114. From the bark of the paper birch tree the Menomini crafted a canoe about twenty feet long and two feet wide, with small ribs and rails of cedar, which could carry four persons or eight hundred pounds of baggage so light that a person could easily portage it around impeding rapids.
F.    baggage so light
G.    baggage being so light
H.    baggage, yet being so light
I.    baggage, and so light
J.    baggage yet was so light

2.大全16, 按OG的解释,这里 yet 前面应该有",".
corporate profits peaked in…yet are slipping since then…

184. As measured by the Commerce Department,
corporate profits peaked in the fourth quarter of 1988 and have slipped since then, as many companies have been unable to pass on higher
A.    and have slipped since then, as many companies have been unable to pass on higher costs
B.    and have slipped since then, the reason being because many companies have been unable to pass on higher costs
C.    and slipped since then, many companies being unable to pass on higher costs
D.    but, many companies unable to pass on higher costs, they have slipped since then
E.    yet are slipping since then, because many companies were unable to pass on higher costs.

OG上的解释如下:
In E, yet also requires a comma before it, are slipping with since then is illogical, and were unable represents an ungrammatical tense shift.

gemj

好问题，UP！