When taking the postgraduate entrance examination for English, can I answer the composition with a blue-black pen?

Absolutely not. This is a unified requirement. Your admission ticket and some related materials clearly say that you should write in black pen. If you don't follow this, you will violate the rules. The teacher has to grade so many papers a day, and you are exhausted. If you look at it, it's illegal, and if you don't look at it, you will be sentenced to 0 directly. In addition, some places use the online marking mode to grade your papers, that is to say, scan them on the computer, yo. If you don't write with a black pen, the articles you write can't be scanned on the computer, and you will be even worse. And why do you want to make this plan, because you have thought of something else? Why don't you do it on the safest basis? You have been reviewing for a year. Can you make him make a mistake at this time? Think about things comprehensively.