提问OG12 SC 71

天青色

Unlike the original National Museum of Science and Technology in Italy, where the models are encased in glass or operated only by staff members,

the Virtual Leonardo Project, an online version of the museum, encourages visitors to “touch” each exhibit, which thereby activates the animated

functions of the piece.

(A) exhibit, which thereby activates

(B) exhibit, in turn an activation of

(C) exhibit, and it will activate

(D) exhibit and thereby activate

(E) exhibit which, as a result, activates

我不理解C选项。这里OG给的解释是因为touch是动词所以it不能指代。指代Project和exhibit也可以都排除。那为什么不能指代to touch each exhibit这个呢？就想it is adj. to do.. 这里的it不是也可以指代to do么？希望好心人帮忙答一下…

yiqing2012

个人理解：首先这里的it即使要指代也不是指代to touch,而是指代encourage to touch~因为will acitivate的原因是整个动作encourage to touch,而不仅仅是to touch。而it作为代词，不可能指代encourage to touch,所以只能指代an online version of the museum，但这样就隔断了encourage和activate的因果联系~所以不对~

PS：it只有在做形式主语、形式宾语的时候才能指代to do结构和that从句~

天青色

谢谢谢谢！

HerringtonD

it一般不指代不错名词性成分的不定式
encourage to do 中to do就不是名词性质的

wxtttt

it is adj. to do..

哪个地方误会大了。。。。

it is adj. to do...中的it是作为placeholder，并不指代任何东西。
比如用that 从句开头会很怪，这时候就轮到这种句型上场啦~~~