Question:
_______________ remains mysterious.
-
A.
That the actor killed himself -
B.
What the actor killed himself -
C.
Why the actor killed himself -
D.
Whether the actor kills himself
Reference explanation:
Correct answer:
Knowledge of noun clauses
We have the structure: That/ What/Wh_(question word) … + S + V1 + (O) + V2 + … (V2 is always singular)
=> Based on the meaning of the sentence, the noun clause is the reason clause, so “why” must be used.
The reason the actor committed suicide is still a mystery.
===============