| 1 | The two firms were joined up to reduce competition. | |
| 2 | This may not have been an official joint operation, but it was almost certainly a collective effort. | |
| 3 | The two countries combined together against their enemy. | |
| 4 | So why is it essential to take these medicines in combination? | |
| 5 | What India does with its water will be a test of whether that combination is possible. |
