Why the first question's answer is D,the second question's answer is A?
1. Because young children do not organize their attention or perceptions systematically, like adults, they may notice and remember details that their elders ignore.
(A) like adults
(B) unlike an adult
(C) as adults
(D) as adults do（D）
(E) as an adult
OG91. Like many self-taught artists, Perle Hessing did not begin to paint until she was well into middle age.
(A) Like
(B) As have
(C) Just as with
(D) Just like（A）
(E) As did
第一题：当like+n.作状语时，象所有的介词短语作状语一样，要考虑它在句中的位置和用来修饰什么，不可导致歧义。
我们注意到A选项和D选项都符合语法规则，也都和前面的children保持数的一致性，从纯语法规则上讲是都正确的。但是A存在歧义。我们不清楚like adults是和前一个分句构成整体还是和后一个分句构成整体。也就是不知道大人是在“do not organize”这个动作上和小孩一样还是在“may notice and remember”这个动作上和小孩一样。所以有歧义。好在前后两个分句的助动词不一样，所以可以使用as结构区分。因为as结构的助动词和前一个分句一致的话，就应该和前一个分句构成整体；同样，和后一个分句的助动词一致的话，就应该和后一个分句构成整体。
第二题： like 常用于比较名词，作独立成分，大部分时候出现在句首。
详情请参见：4. Like
like用法总结
http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=70082
Like / As 强烈推荐
http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=48608
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