Use the correct form of the present simple or the present perfect simple to complete the sentences.
1. I`ve just read an interesting article about the special abilities of "autistic savants".
2. Stephen Wiltshire has painted beautiful pictures since he was eight.
3. About 10% of children diagnosed with autism show some special talent.
4. There`s an Australian autistic savant, Daniel T, who speaks seven languages, and has created his own language.
5. Scientists have studied Daniel`s talents for some time with great fascination.
6. When he is not working, Daniel loves hanging out with friends.