Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which Opponents have a Year of 1999–2000, and a Team of leeds united?

### Inputs:
table_name: table, columns: ['Year', 'Team', 'Progress', 'Score', 'Opponents']

### Response:
SELECT Opponents FROM table WHERE Year = 1999–2000 AND Team = leeds united