Today’s SAT question is a writing question that asks if the following sentence needs any modifications to the underlined “like”:

Like machinery was integral to the development of industrial capitalism, so the rapid transfer of information is the force driving modern business.

“Like” and “so” have been known go together sometimes (like the sands of the hourglass, so are the days of our lives…”, but do these correlative conjunctions function correctly here?…sadly, no.  They don’t.  We need “so”‘s regular partner, “just as” in order to make this sentence work. “Like” is a preposition, and it can’t function as a conjunction here.