Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Rewrite the following sentence to move the adverbial clause to the beginning of the sentence.

### Input:
The professor answered the student’s question quickly although he had been busy with his work.

### Response:
Although he had been busy with his work, the professor quickly answered the student’s question.