So when I'm not sure, I always think I can check back.

Try to solve it once and for all. If you are really not sure, choose the answer that you are most sure of, and then pass this time.

Hint at yourself that your answer is right. Don't dwell on one problem all the time, it will affect the following problems.

Besides, I'm from Jiangsu. We fill in the blanks and then ask big questions.

According to this situation, I usually look back after filling in the blanks to see if there are any careless spelling mistakes or inappropriate writing, and then leave the blank and do the big questions at the back with confidence.

In a word, I'm not thinking about checking, but when I have entered the thinking of this problem.