I'm a roast duck who took the exam twice. If the topic requires you to write YES/NO/NOT GIVEN, if you abbreviate it, it's no problem at all. This is certified by the examiner. And I also wrote this, the first time I read 7, the second time I read 6, 5, which proved no problem.

But if you are asked to write YES/NO/NOT GIVEN, it is even more dangerous for you to write T/ F/ NG.

But the examiner is kind sometimes. I know a classmate who is a good reader. Once after he finished the exam, he found that he had written yes/no/no as true/false/no, but when he finally got the score, it was still 8.5.

So it turns out that shorthand is absolutely no problem! !

But if you write Y/N and you write T/F, it's not necessarily! !