Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
To be a(n) （ ）, one needs profound knowledge as well as a very vivid imagination. (invent)
【正确答案】：INVENTOR
【题目解析】：
根据前文a说明空格处应该填名词的形式，invent的名词形式为inventor或invention，根据句意，one是人，所以他要成为的应该是人，填inventor发明家。句意：要成为一个发明家，一个人需要渊博的知识和非常生动的想象力。