Heyo! I can give you a bunch of tips that I use and help me, but may not necessarily work for you (you can still try incorporate them and see if they work for you!). Any questions that ask about what the overall intention/message of the passage is you should be able to answer by reading the first and last few sentences, which usually sum up the entirety of the article. I then proceed to select an answer option that most closely matches what I already sum up the passage to be. If questions ask for more comprehension-type answers, such as 'which of the following is supported by the passage/false/unable to be deduced from the passage', then you could try reading the entire passage before reading the questions, or if you already do this, switch it up and read the questions before scanning for the answer. Usually, there are 1 or 2 answer options that you can 'eliminate' for the time being. I'll show you what I mean with an example:
Which of the following from the passage is true?
- Grizzly bears only eat salmon.
- Some polar bears live in the Arctic and hunt for food such as seals.
- L. R. Larkins was the first and only man to conduct a study investigating the effects of salmon populations on the health of grizzly bear cubs.
- The population of bears worldwide is currently estimated to be 750,000.
(Btw I made this question up). Basically, words such as ONLY and other high modality words are a big signal that they are probably false/can't tell. This is not always the case, but usually is, so the only answer options I'd check in the passage would be the second and last ones. If none of these ends up being true, then I'd search for the next most-plausible answer and continue. Usually eliminating answer options like this helps you save lots of time that you would have wasted searching for answer options that are likely to be false anyway.
For questions that involve asking 'what would the author agree with?' just search for the area in the passage where the specific information is and you should find your answer, considering the types of words the author uses around that specific concept/idea.
Again, this is the stuff I do - try adapt it to suit your own style of answering questions.
I see N182 has already answered your question in a much more succinct way. I'll just leave this here anyway in case it is helpful!