Select the most appropriate option to fill in the blank.
They saw him, ______?

Correct option is D

The correct option to fill in the blank is (d) didn’t they.
Explanation: This is a question tag. A positive main clause takes a negative tag and vice versa. The main verb is in simple past (“saw”), so the auxiliary used in the tag must be did. The subject “they” repeats in the tag, and the polarity is reversed: positive statement → negative tag. Hence, “ didn’t they” is correct.
Example: She finished early, didn’t she?
Explain why other options are incorrect:
· (a) did he: Wrong subject and polarity; also needs negative tag after a positive statement. (Hindi: “क्या उसने किया?”—विषय मेल नहीं खाता)
· (b) hasn’t he: Wrong auxiliary (present perfect) and wrong subject. (Hindi: सहायक क्रिया काल मेल नहीं खाता)
· (c) did they: Polarity not reversed (needs negative tag). (Hindi: नकारात्मक टैग चाहिए)
Information booster (Question Tags):
· If the sentence has no auxiliary, use do/does/did according to tense and subject.
· Imperatives often take will you / won’t you / would you.
· With I am, tag is typically aren’t I in informal usage.