Choose a sentence from the two
概括：A.Don't waste time thinking about more ideas when in an exam.
B.Write down briefly whatever comes to your mind before starting writing
When you have chosen your topic,and perhaps have a general idea of your theme,make quick short notes of all the ideas that come into your head.Remember that these should be notes—words or phrases—not sentences,which would slow you down.As you do this,you will find that new ideas will come to you,for one idea leads to another.This should not take more than ten minutes,for in an exam you have no time to waste.