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The world's tallest building explodes like a rocket - as it is lit up by fireworks at its official opening yesterday.Two hours after the official opening, 271 people have entered.We had to get there before the official opening.
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adjective [usually ADJECTIVE noun] 
Official means approved by the government or by someone in authority.
Collins COBUILD Advanced Learner’s Dictionary. Copyright © HarperCollins Publishers
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Quick word challenge
Quiz Review
Question: 1
-
Score: 0 / 5
long-term goal
or
winning goal?
Drag the correct answer into the box.
long-term goal
winning goal
This needs to be approached in a realistic manner.
murder scene
or
music scene?
Drag the correct answer into the box.
murder scene
music scene
Mobile signals enabled police to place them at the .
criminal activity
or
economic activity?
Drag the correct answer into the box.
criminal activity
economic activity
There is no indication that either of them was involved in .
faltering economy
or
industrial economies?
Which version is correct?
divorce battle
or
leadership battle?
Which version is correct?
Your score: