Complete the texts with the past forms of the verbs in breckets. AMAZING COPEN.
William Sidis was (be) born in New York in 1898. He (can) speak more than ten languages and when he ___ (be) eleven, he (be) already a student at Harvard University. He (be) already a professor when he (be) twenty. He ___ (be) amazing but, unfortunately, he (not/be) a happy child.
