as vs Like

by **intrepid17** Tue Mar 23, 2010 9:53 pm

Question Source :
http://www.gmat-pacer.com/guidec4.html

A)Timothy talks (like/as) his friends do.

The site mentions that :
This is one of the few instances "like" should be used in English. "Like" is used here as a direct comparison

My Question : The comparison is between the way both talk i.e of verbs , then why will like be used?

B) The site mentions that :There are times, as now, that learning grammer becomes important.

My Question : The comparison is between noun : times and now , then why will as be used?

C) The site mentions that : The joint-venture contract covers such questions (like/as) the division of profits and costs.
"Covers... as" is better here.

My Question : Is "such as" being preferred over "like" ? OR "as" over "like" ?