Collins collocations

Swift change could save Britain's already ​ (a)   economy.

• faltering
• industrial

Answer explanation

already faltering: already failing

The adverb already refers to 'faltering' and makes no sense when combined with 'industrial,' even though 'industrial economy' by itself is ok.

His research resulted in a surprisingly ​ (a)   formula for calculating population density.

• successful
• mathematical

The proposals also ​ (a)   questions about workers' retirement age.

• raise
• field

Answer explanation

If you say that someone fields a question, you mean that they answer it or deal with it, usually successfully.

If you raise a question, you just ask the question

This city has an exciting arts and ​ (a)   scene.

• music
• murder

Features such as electric windows ​ (a)  

• consume energy
• muster the energy

Researchers will help us better understand the causes and ​ (a)  

• improve treatment
• deny treatment

The trial of this murderer may take more than a year to ​ (a)  

• reach court
• attend court
• hold court

He denies the ​ (a)   atmosphere at the club is getting to his players.

• toxic
• fantastic

He paid tribute to her in a very emotional ​ (a)   speech.

• victory
• slurred

Rescue workers were trying to limit any ​ (a)   damage.

• environmental
• nerve
• engine