I would suggest for RC to really read the passage in 2 minutes no matter how long it is. Maybe 2.5 min for a super long passage or 1.5 for a super short passage but no more than that. This will allow you to get to the question sooner and then dive back into the passage if need be to answer the questions. Also the MOST important part about the passage is knowing the main idea. I believe it is essential to take 10-20 seconds after you read the passsage to think about the main idea, if you know the main idea then you can probably get 2 of the questions right by simply picking the answer that relates back to the main idea.
In terms of CR 700 level questions it’s super important to READ SLOWLY and again think about what the passage is saying after and pick out the conclusion. For assumption questions to negation technique is great and for bold face make sure to look at the non bold parts just before and after the bold to get an idea of what the bold is doing in the passage. CR is a bit of a fickle beast and I would ONLY stick to official questions for CR because some of the questions out there are very poor and can do more harm than good
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