ACCorDing to this pAssAgE, to BE A pArA-proFEssionAl onE ______. A.usuAlly rECEivEs somE trAining For DoCtors' work B.is trAinED ExtEnsivEly For A CErtAin pErioD oF timE C.grADuAtEs From A mEDiCAl CollEgE or sChool D.goEs ovEr thE BAsiC CoursEs within 18 months