5 The new museum ..... (open) by the mayor next week.

Passive voice explanation:

• The passive voice is used to show what happens to the subject.
• It is formed with the verb 'to be' (in the correct tense) + the past participle of the main verb.
• For future events, we use 'will be' + past participle.

Answer:

5 The new museum will be opened by the mayor next week.