885 sec12-19 http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=15663&page=1
19. Although it claims to delve into political issues, television can be superficial such as when each of the three major networks broadcast exactly the same statement from a political candidate.
(A) superficial such as when each of the three major networks
(B) superficial, as can sometimes occur if all of the three major networks
(C) superficial if the three major networks all
(D) superficial whenever each of the three major networks
(E) superficial, as when the three major networks each
这道题选E，当时讨论结果是if后面不可以跟can,所以c错
再看OG11-8这题
8. Rising inventories, when unaccompanied correspondingly by increases in sales, can lead to production cutbacks that would hamper economic growth.
(A) when unaccompanied correspondingly by increases in sales, can lead
(B) when not accompanied corresponding by increases in sales, possibly leads
(C) when they were unaccompanied by corresponding sales increases can lead
(D) if not accompanied by correspondingly increased sales, possibly leads
(E) if not accompanied by corresponding increases in sales, can lead
选E，OG明确解释说可以用if，不能用when,这样不适与大全相悖了吗？还请牛人解释
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