general module reading

do i need to read the entire passage or the key words in the questions.

suggest me how to read for the 14 different types of questions in ielts.

in order to get 6 band i need 30 marks in GT module

I have a little experience for this question:

do i need to read the entire passage or the key words in the questions?

what I did:

step one: read the entire passage, but very quickly, like scan. so I can have a big picture for the passage.

step two: read the question carefully and find out key words in the question

step three: from the key words and question, go back to passage again and try to reach the answer.