OG 13 SC explanations is too complicated to understand

[coolanujdel]

Experts,

I am reading OG13 SC part and my problem is related to OG 13 explanation which states too short explanation or explanation from which you can't learn any concepts.
For e.g. In OG 13, question no. 132 (randomly selected ) gives the explanation of grammar problem , but question is whats the "Take Away" from the answer? Here i would like to mention that i searched a different explanation to this question to understand and searched through You Tube and got the perfect answer and got the "Take Away" for "Although" construction.

So my question is how to learn from OG explanation OR is there any link to learn the concepts through OG13 Solution!!

Hope for quick response

Anuj

[Kasia@EconomistGMAT]

The Official Guide is not a good resource to learn from. You should go through a course which will provide the theory behind the topics tested in the GMAT. Only after working with another book/ course it is practical to use the OG as the source of test questions.