Put the verbs in brackets into correct tense and voice form. 1) teenagers . . (prefer) original and eye-catching clothes. 2) isaac newton . . (discover) the law of gravitation in 1665. 3) a person who spends too much time watching tv . . (call) a "couch potato". 4) the game of basketball . . (invent) by james naismith in 1891. 5) public tv usually . . (focus) on education and culture. 6) she . . (wrok) as a babysitter when he was 16.