As for SC, it'll depend on your error rate. Both 菜鸟总结 and 大全 are excellent. You can't go wrong with either. I would probably recommend 大全 if you're comfortable with OG already.
And i still want to know when I should begin to work on GWD.Since so many CDers have mentioned its importance,I 'm afraid I will have no time to catch its essence welll at the last preparing days~~~~~~~~~
Sorry,I just make a mistake about the error rate.HOHO~~~~~~~~
Cause its my 2nd time to do the OG(SC), maybe this rate is not my real level.
At the beginning,I want to use GWD to test my level later (Maybe one month before the test),therefore I haven't started to do it .But perhaps its not a wise choice~~