2 OGＳＣ

primefang

In an effort to reduce their inventory, Italian vinters have cut prices;their wines have been priced to sell, and they are

A> have been priced to sell, and they are
B> are priced to sell, and they have
C> are priced to sell, and they do
D>are being priced to sell, and have
E> had been priced to sell, and they have

The answer is C
请教： and 前面可以加逗号吗？
       此题如何分析

2 When the technique known as gene-splicing was invented in the early 1970's , it was feared that scientests might inadvertently create an "Andromeda strain", a micorbe never before seen on Earth that might escape from the lab and it would kill vast numbers of humans who would have no natural defenses against it

A>it would kill vast numbers of humans who would have no natural defenses against it
B> it might kill vast numbers of humans with nonatural defenses against it
C>kill vast numbers of humans who would have no natural defenses against it
D> kill vast numbers of humans who have no natural defenses agaisnst them
E> kill vast numbers of humans with no natrual defenses against them

The answer is C;

请教： C中为什么要用 would, would 的用法是什么

redpot

Yes.  Actually, I think in the real world, you have to put a comma before "and" if there are more than 2 things.  (But I found out that some anwser in OG showed it not necessary.  I was confused.)  As to 2 sentence, I think it works too.  
As to the second one, consider the time tense and pron., you can only choose "c", right?

tongxun

记得ETS将此题的答案修订了，具体是哪个我再问一下其他G友。注意看贴。

primefang

OG answer for the first SC is C

tongxun

and 前面可以加逗号吗？
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当然可以。这题的答案好象是错的。
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C中为什么要用 would, would 的用法是什么
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表示条件，即OG上所讲的conditional tense。