Question 63
Verb FormsChoose the most appropriate option to fill the gap: Radium________ Maria Sklodowska Curie.
- A.discovered
- B.is discovering
- C.has discovered
- D.was discovered by
- E.had been discovered by
Show the answer and explanation
Answer: D (was discovered by)
Explanation
Radium did not discover anything; it was discovered by Marie Curie, so the passive 'was discovered by' is needed.