Buildings in metaphors

The cost of petrol (has increased in a rapidly and uncontrolled way) in the last six months.

His friends were ________________ when his father died.

My dad will (be very angry) when he finds out I dented the car.

The president visited the country to ___________ the alliance between the two countries.

A good education is the ________________to success.

She (has broken down the barriers) to reach a top corporate position in the company.

The research has provided (the most important thing) to developing a vaccine against coronavirus.

He used his friends to help him get into the buisiness (by using corrup methods)