Score Choice on SAT Subject Tests confused?

<p>I read the thing on collegeboard's website and I am confused. If I take 2 subject tests in june and let's say I score really well on 1, but okay on the other, can I just choose to send only 1 of the subject tests? If not, would it be better to take the tests at separate dates? Also, Would it hurt to take a subject test mainly to see how I would do?</p>