Answer and explanation

Correct answer: B. will be opened

  1. Step 1: The agent phrase 'by the mayor' needs a passive verb, and 'next year' needs the future.
Answer
will be opened.
Why not the others: "will be opening" is wrong because 'be opening' is a future continuous active form, not a passive. "will open" is wrong because an active verb cannot take the agent 'by the mayor'. "is opened" is wrong because the present simple passive does not carry future meaning here.

Practise more Passives, gerunds, infinitives and modals.

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