Again I find it interesting tha the first of this is Paul expressing that he did not want us to be ignorant on this subject..
Some people I talk to know NOTHING about the gifts of the Holy Spirit...not even what they were back when the Bible was written.
Some people know something about the gifts, but their knowledge is very limited.
I found myself in the know NOTHING side...because it was never taught at our church!
When I first embraced the truth about this it was in defense! I was debating that they no longer exist (this was how I was taught). But when they started showing me scriptures I had never seen...and I went to God and ask what is the truth about this....well, this is just the beginning of my journey into understanding of the manifestations of the Spirit.
Some people's gifts are described as wisdom, administration, evangelism, teaching, or even prophesy (known tongues)...and Paul seems to say these are more desirable than tongues...
I believe it is a mistake to say that every believer must speak in tongues. There are obviosly many Godly peope who don't...and who do...and there are just as obviously there are just as obviously those who speak in tongues but who are very immature in the faith, and use it in unhelpful ways...some even who teach heresy...
So tongues cannot be a test of the Spirit's work...They can be present in churches led by false teachers...and they can be absent among godly, faithful Christians.