根据句意及首字母或汉语提示完成单词

①The illness s____ quickly;  many people have been dead.

②I am new here, so I make the necessary i____ before class.

③ The more books we read, the more k____ we obtain(获得).

④ Some people believe that God ____ (创造)the world.

⑤ Madame Curie ____ (发明)the X-ray machine.