og13 sc7的解释

ShilohQ · 发表于 2014-7-29 14:06:33

Even you change assuming to assumption, the sentence is still wrong because:

- Structure: "assumption that + clause" is not as good as "assume that + clause"
(1) Scientists have the assumption that whale evolved from elephant
(2) Scientists assume that whale evolved from elephant
Which one is better. Definitely, GMAT likes the latter, it's more concise and has clear meaning.
Remember the order V-A-N (verb-adjective-noun). If you can use verb, use verb, do not use noun form.

- Idiom: assumption that ==> incorrect. Correct idiom is "assumption of/about"

having = have + ing = verb + ing.
verb-ing modifiers are very versatile modifiers.
there are two case

if verb-ing modifiers appear after a clause and is preceeded by comma ,then it modifies the entire preceeding clause.It
a) either presents additional information about the preceeding clause or
b) result of the preceeding clause.

if verb-ing modifiers appears without a comma==>it modifies the immediate noun.

now in our question:

The intricate structure of the compound insect eye, having hundreds of miniature eyes called ommatidia, help explain why scientists have assumed that it evolved independently of the vertebrate eye.

so according to rule HAVING is modifying the entire preceeding clause....
so in this sentence ...meanig coming out: intricate structure are having hundreds of miniature eyes==> this is illogical as structure cant have eyes...
hence we can eliminate all the option using HAVING

with既可以指代前面的名词也可以指代前面一整句话，看意思来理解即可。

og13 sc7的解释

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