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】：
本题考查常见动词的名词形式。
由be a可知，空缺处应填名词，invent的名词有inventor、invention，此处应该为人，所以填inventor意为“发明家”。
句意：要成为一个发明家，我们需要有丰富的知识和生动的想象力。