Is this font suitable for the senior high school entrance examination? How to improve?

This font may be a bit inappropriate in the senior high school entrance examination, but it is ok, that is, writing this word slowly may affect the speed and time of answering questions. As you can see from your handwriting, you should be very talented in calligraphy. I suggest you practice running script on the basis of copying regular script and official script systematically, which will not only improve the writing speed, but also make the writing more beautiful.