____ do you think he invited to the dance?
a. Who
b. Whom
a. Who
To determine whether "who" or "whom" should be used in the sentence, we can apply the rule of grammar that "who" is used as the subject of a verb, while "whom" is used as the object of a verb or preposition.
In the given sentence, the word "do" functions as the main verb, and "he" is the subject of that verb. Therefore, the correct choice would be:
a. Who
So the corrected sentence would read: "Who do you think he invited to the dance?"