infinitive of purpose questions

[davetzulin]

These questions are based on reading Chapter 13 Advanced strategy.

(1). The building was demolished TO AVOID falling down accidentally [incorrect]
(2). The building was demolished TO KEEP IT from falling down accidentally [correct]

mgmat guide states that the subject of the main verb is the implied subject of the infinitive and therefore a building cannot avoid something.

Then I modified another example using the same line of thinking

(1). The stocks were not sold TO AVOID a stock market crash [?]
(2). The stocks were not sold TO KEEP them from crashing the stock market [?]

is #1 above really wrong? #2 doesn't seem to make any sense

It appears that only when the subject following the infinitive is the same as the subject of the main verb, then you have the problem?

[tim]

the examples you posted are too riddled with ambiguity and meaning issues for us to have a proper discussion of them. please use examples you've found in our materials or the GMAT prep software to avoid this problem..