She was certainly going to the cinema, _____?

Analyze the question This tests question tags. A question tag repeats the auxiliary verb of the main sentence and uses a pronoun that matches the subject. A positive statement takes a negative tag, and a negative statement takes a positive tag.

Explain the concept Rules for question tags:

1. Use the same auxiliary (helping) verb and the same tense as the main clause.
2. Use a pronoun that matches the subject (she, he, they, it, and so on).
3. Reverse the polarity: positive statement → negative tag.

Solve step by step

• Sentence: "She was certainly going to the cinema..."
• Subject: She → the tag pronoun must be she. This rules out B and C, which use "it".
• Verb: was going (past continuous) → the auxiliary is was, so the tag must be in the past: wasn't. This rules out A, "isn't she", which is present tense.
• The statement is positive, so the tag is negative: wasn't she?

Full sentence: "She was certainly going to the cinema, wasn't she?"

Answer: D.

Tip: Find the subject, find the auxiliary, then flip positive to negative. Match tense and pronoun, and the answer follows. Adverbs like "certainly" do not change the tag.