I suggest you take part in the competition instead of training for the college entrance examination. Because the content of the college entrance examination and the competition is far from each other. The difficulty of knowledge is different. Competition pays attention to the whole (a lot of knowledge is not encountered at all in normal study). For example, I ask you what course and subject earthworms belong to. Our college entrance examination is closely related to textbooks. Just an extension of textbook knowledge.

But if I study well and have great hopes of winning the grand prize, I will only attend the training for this purpose, so I think it is ok, because I can walk and get extra points.

If the exam is not the first purpose, after all, the time in senior three is precious.

I wish you a good choice.