From the words lettered A to D choose the word or group of words that best completes the sentence.
The police vehicles raced .. full speed with their sirens blaring.

Emmanuel24458

1 year ago

The phrase "in full speed" is not idiomatic in English. Instead, we use "at full speed" to convey the idea of moving or operating as fast as possible.

# Key Difference
1. *At full speed*: means moving or operating as fast as possible.
2. *In full speed*: not a common or idiomatic expression in English.

The correct sentence remains: "The police vehicles raced at full speed with their sirens blaring."